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Finding the Fourth Proportional to 28,306.81, 42,460.22 and 12,706.21

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Solution

The fourth proportional to 28,306.81, 42,460.22 and 12,706.21 is: 19,059.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,306.81 : 42,460.22 = 12,706.21 : x
  2. Step 2: Convert to fraction form
    28,306.81/42,460.22 = 12,706.21/x
  3. Step 3: Cross multiply
    28,306.81x = 42,460.22 × 12,706.21
  4. Step 4: Simplify right side
    28,306.81x = 539,508,471.97
  5. Step 5: Solve for x
    x = 539,508,471.97/28,306.81
  6. Step 6: Final answer
    x = 19,059.32

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Similar ratio
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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.