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Finding the Fourth Proportional to 18,429.76, 25,432.10 and 10,470.88

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Solution

The fourth proportional to 18,429.76, 25,432.10 and 10,470.88 is: 14,449.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.76 : 25,432.10 = 10,470.88 : x
  2. Step 2: Convert to fraction form
    18,429.76/25,432.10 = 10,470.88/x
  3. Step 3: Cross multiply
    18,429.76x = 25,432.10 × 10,470.88
  4. Step 4: Simplify right side
    18,429.76x = 266,296,340.09
  5. Step 5: Solve for x
    x = 266,296,340.09/18,429.76
  6. Step 6: Final answer
    x = 14,449.26

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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.