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Finding the Fourth Proportional to 7,128.92, 10,681.10 and 5,045.48

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Solution

The fourth proportional to 7,128.92, 10,681.10 and 5,045.48 is: 7,559.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.92 : 10,681.10 = 5,045.48 : x
  2. Step 2: Convert to fraction form
    7,128.92/10,681.10 = 5,045.48/x
  3. Step 3: Cross multiply
    7,128.92x = 10,681.10 × 5,045.48
  4. Step 4: Simplify right side
    7,128.92x = 53,891,276.43
  5. Step 5: Solve for x
    x = 53,891,276.43/7,128.92
  6. Step 6: Final answer
    x = 7,559.53

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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.