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Finding the Fourth Proportional to 18,303.49, 25,258.85 and 9,919.99

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Solution

The fourth proportional to 18,303.49, 25,258.85 and 9,919.99 is: 13,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,303.49 : 25,258.85 = 9,919.99 : x
  2. Step 2: Convert to fraction form
    18,303.49/25,258.85 = 9,919.99/x
  3. Step 3: Cross multiply
    18,303.49x = 25,258.85 × 9,919.99
  4. Step 4: Simplify right side
    18,303.49x = 250,567,539.41
  5. Step 5: Solve for x
    x = 250,567,539.41/18,303.49
  6. Step 6: Final answer
    x = 13,689.60

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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.