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Finding the Fourth Proportional to 28,446.57, 42,669.87 and 9,726.78

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Solution

The fourth proportional to 28,446.57, 42,669.87 and 9,726.78 is: 14,590.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,446.57 : 42,669.87 = 9,726.78 : x
  2. Step 2: Convert to fraction form
    28,446.57/42,669.87 = 9,726.78/x
  3. Step 3: Cross multiply
    28,446.57x = 42,669.87 × 9,726.78
  4. Step 4: Simplify right side
    28,446.57x = 415,040,438.12
  5. Step 5: Solve for x
    x = 415,040,438.12/28,446.57
  6. Step 6: Final answer
    x = 14,590.18

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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.