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Finding the Fourth Proportional to 15,340.21, 21,169 and 8,626.12

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Solution

The fourth proportional to 15,340.21, 21,169 and 8,626.12 is: 11,903.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,340.21 : 21,169 = 8,626.12 : x
  2. Step 2: Convert to fraction form
    15,340.21/21,169 = 8,626.12/x
  3. Step 3: Cross multiply
    15,340.21x = 21,169 × 8,626.12
  4. Step 4: Simplify right side
    15,340.21x = 182,606,334.28
  5. Step 5: Solve for x
    x = 182,606,334.28/15,340.21
  6. Step 6: Final answer
    x = 11,903.77

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Half scale
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Double scale
Find fourth proportional to 15,341.21, 21,170.38 and 8,627.12
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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.