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Finding the Fourth Proportional to 7,294.75, 10,920.90 and 5,428.91

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Solution

The fourth proportional to 7,294.75, 10,920.90 and 5,428.91 is: 8,127.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,294.75 : 10,920.90 = 5,428.91 : x
  2. Step 2: Convert to fraction form
    7,294.75/10,920.90 = 5,428.91/x
  3. Step 3: Cross multiply
    7,294.75x = 10,920.90 × 5,428.91
  4. Step 4: Simplify right side
    7,294.75x = 59,288,583.22
  5. Step 5: Solve for x
    x = 59,288,583.22/7,294.75
  6. Step 6: Final answer
    x = 8,127.57

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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.