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Finding the Fourth Proportional to 6,386.80, 9,587.40 and 4,932.40

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Solution

The fourth proportional to 6,386.80, 9,587.40 and 4,932.40 is: 7,404.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.80 : 9,587.40 = 4,932.40 : x
  2. Step 2: Convert to fraction form
    6,386.80/9,587.40 = 4,932.40/x
  3. Step 3: Cross multiply
    6,386.80x = 9,587.40 × 4,932.40
  4. Step 4: Simplify right side
    6,386.80x = 47,288,891.76
  5. Step 5: Solve for x
    x = 47,288,891.76/6,386.80
  6. Step 6: Final answer
    x = 7,404.16

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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.