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Finding the Fourth Proportional to 11,365.57, 15,689.34 and 7,641.73

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Solution

The fourth proportional to 11,365.57, 15,689.34 and 7,641.73 is: 10,548.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,365.57 : 15,689.34 = 7,641.73 : x
  2. Step 2: Convert to fraction form
    11,365.57/15,689.34 = 7,641.73/x
  3. Step 3: Cross multiply
    11,365.57x = 15,689.34 × 7,641.73
  4. Step 4: Simplify right side
    11,365.57x = 119,893,700.16
  5. Step 5: Solve for x
    x = 119,893,700.16/11,365.57
  6. Step 6: Final answer
    x = 10,548.85

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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.