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Finding the Fourth Proportional to 15,365.28, 21,204.12 and 8,651

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Solution

The fourth proportional to 15,365.28, 21,204.12 and 8,651 is: 11,938.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,365.28 : 21,204.12 = 8,651 : x
  2. Step 2: Convert to fraction form
    15,365.28/21,204.12 = 8,651/x
  3. Step 3: Cross multiply
    15,365.28x = 21,204.12 × 8,651
  4. Step 4: Simplify right side
    15,365.28x = 183,436,842.12
  5. Step 5: Solve for x
    x = 183,436,842.12/15,365.28
  6. Step 6: Final answer
    x = 11,938.40

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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.