Home / 28,428.31-42,642.57-8,706.78

Finding the Fourth Proportional to 28,428.31, 42,642.57 and 8,706.78

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Solution

The fourth proportional to 28,428.31, 42,642.57 and 8,706.78 is: 13,060.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.31 : 42,642.57 = 8,706.78 : x
  2. Step 2: Convert to fraction form
    28,428.31/42,642.57 = 8,706.78/x
  3. Step 3: Cross multiply
    28,428.31x = 42,642.57 × 8,706.78
  4. Step 4: Simplify right side
    28,428.31x = 371,279,475.62
  5. Step 5: Solve for x
    x = 371,279,475.62/28,428.31
  6. Step 6: Final answer
    x = 13,060.20

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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.