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Finding the Fourth Proportional to 18,302.63, 25,257.57 and 9,919.13

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Solution

The fourth proportional to 18,302.63, 25,257.57 and 9,919.13 is: 13,688.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,302.63 : 25,257.57 = 9,919.13 : x
  2. Step 2: Convert to fraction form
    18,302.63/25,257.57 = 9,919.13/x
  3. Step 3: Cross multiply
    18,302.63x = 25,257.57 × 9,919.13
  4. Step 4: Simplify right side
    18,302.63x = 250,533,120.31
  5. Step 5: Solve for x
    x = 250,533,120.31/18,302.63
  6. Step 6: Final answer
    x = 13,688.37

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Half scale
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Double scale
Find fourth proportional to 18,303.63, 25,258.95 and 9,920.13
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.