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Finding the Fourth Proportional to 28,428.17, 42,642.25 and 8,704.19

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Solution

The fourth proportional to 28,428.17, 42,642.25 and 8,704.19 is: 13,056.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.17 : 42,642.25 = 8,704.19 : x
  2. Step 2: Convert to fraction form
    28,428.17/42,642.25 = 8,704.19/x
  3. Step 3: Cross multiply
    28,428.17x = 42,642.25 × 8,704.19
  4. Step 4: Simplify right side
    28,428.17x = 371,166,330.87
  5. Step 5: Solve for x
    x = 371,166,330.87/28,428.17
  6. Step 6: Final answer
    x = 13,056.29

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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.