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Finding the Fourth Proportional to 18,109.20, 24,991.02 and 10,151.40

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Solution

The fourth proportional to 18,109.20, 24,991.02 and 10,151.40 is: 14,009.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.20 : 24,991.02 = 10,151.40 : x
  2. Step 2: Convert to fraction form
    18,109.20/24,991.02 = 10,151.40/x
  3. Step 3: Cross multiply
    18,109.20x = 24,991.02 × 10,151.40
  4. Step 4: Simplify right side
    18,109.20x = 253,693,840.43
  5. Step 5: Solve for x
    x = 253,693,840.43/18,109.20
  6. Step 6: Final answer
    x = 14,009.11

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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.