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Finding the Fourth Proportional to 7,641.92, 10,545.20 and 5,653.76

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Solution

The fourth proportional to 7,641.92, 10,545.20 and 5,653.76 is: 7,801.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,641.92 : 10,545.20 = 5,653.76 : x
  2. Step 2: Convert to fraction form
    7,641.92/10,545.20 = 5,653.76/x
  3. Step 3: Cross multiply
    7,641.92x = 10,545.20 × 5,653.76
  4. Step 4: Simplify right side
    7,641.92x = 59,620,029.95
  5. Step 5: Solve for x
    x = 59,620,029.95/7,641.92
  6. Step 6: Final answer
    x = 7,801.71

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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.