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Finding the Fourth Proportional to 18,437.64, 25,443.10 and 11,279.47

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Solution

The fourth proportional to 18,437.64, 25,443.10 and 11,279.47 is: 15,565.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,437.64 : 25,443.10 = 11,279.47 : x
  2. Step 2: Convert to fraction form
    18,437.64/25,443.10 = 11,279.47/x
  3. Step 3: Cross multiply
    18,437.64x = 25,443.10 × 11,279.47
  4. Step 4: Simplify right side
    18,437.64x = 286,984,683.16
  5. Step 5: Solve for x
    x = 286,984,683.16/18,437.64
  6. Step 6: Final answer
    x = 15,565.15

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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.