Home / 28,381.67-42,572.51-8,660.33

Finding the Fourth Proportional to 28,381.67, 42,572.51 and 8,660.33

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Solution

The fourth proportional to 28,381.67, 42,572.51 and 8,660.33 is: 12,990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.67 : 42,572.51 = 8,660.33 : x
  2. Step 2: Convert to fraction form
    28,381.67/42,572.51 = 8,660.33/x
  3. Step 3: Cross multiply
    28,381.67x = 42,572.51 × 8,660.33
  4. Step 4: Simplify right side
    28,381.67x = 368,691,942.23
  5. Step 5: Solve for x
    x = 368,691,942.23/28,381.67
  6. Step 6: Final answer
    x = 12,990.50

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Double scale
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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.