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Finding the Fourth Proportional to 10,462.80, 15,686.20 and 5,272.40

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Solution

The fourth proportional to 10,462.80, 15,686.20 and 5,272.40 is: 7,904.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,462.80 : 15,686.20 = 5,272.40 : x
  2. Step 2: Convert to fraction form
    10,462.80/15,686.20 = 5,272.40/x
  3. Step 3: Cross multiply
    10,462.80x = 15,686.20 × 5,272.40
  4. Step 4: Simplify right side
    10,462.80x = 82,703,920.88
  5. Step 5: Solve for x
    x = 82,703,920.88/10,462.80
  6. Step 6: Final answer
    x = 7,904.57

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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.