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Finding the Fourth Proportional to 18,758.86, 28,158.11 and 18,335.32

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Solution

The fourth proportional to 18,758.86, 28,158.11 and 18,335.32 is: 27,522.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.86 : 28,158.11 = 18,335.32 : x
  2. Step 2: Convert to fraction form
    18,758.86/28,158.11 = 18,335.32/x
  3. Step 3: Cross multiply
    18,758.86x = 28,158.11 × 18,335.32
  4. Step 4: Simplify right side
    18,758.86x = 516,287,864.13
  5. Step 5: Solve for x
    x = 516,287,864.13/18,758.86
  6. Step 6: Final answer
    x = 27,522.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.