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Finding the Fourth Proportional to 15,869.55, 21,901.29 and 8,798.25

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Solution

The fourth proportional to 15,869.55, 21,901.29 and 8,798.25 is: 12,142.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869.55 : 21,901.29 = 8,798.25 : x
  2. Step 2: Convert to fraction form
    15,869.55/21,901.29 = 8,798.25/x
  3. Step 3: Cross multiply
    15,869.55x = 21,901.29 × 8,798.25
  4. Step 4: Simplify right side
    15,869.55x = 192,693,024.74
  5. Step 5: Solve for x
    x = 192,693,024.74/15,869.55
  6. Step 6: Final answer
    x = 12,142.31

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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.