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Finding the Fourth Proportional to 28,545.79, 42,808.04 and 9,820.53

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Solution

The fourth proportional to 28,545.79, 42,808.04 and 9,820.53 is: 14,727.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.79 : 42,808.04 = 9,820.53 : x
  2. Step 2: Convert to fraction form
    28,545.79/42,808.04 = 9,820.53/x
  3. Step 3: Cross multiply
    28,545.79x = 42,808.04 × 9,820.53
  4. Step 4: Simplify right side
    28,545.79x = 420,397,591.96
  5. Step 5: Solve for x
    x = 420,397,591.96/28,545.79
  6. Step 6: Final answer
    x = 14,727.13

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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.