Home / 10,655.92-15,985.80-4,815.28

Finding the Fourth Proportional to 10,655.92, 15,985.80 and 4,815.28

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Solution

The fourth proportional to 10,655.92, 15,985.80 and 4,815.28 is: 7,223.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,655.92 : 15,985.80 = 4,815.28 : x
  2. Step 2: Convert to fraction form
    10,655.92/15,985.80 = 4,815.28/x
  3. Step 3: Cross multiply
    10,655.92x = 15,985.80 × 4,815.28
  4. Step 4: Simplify right side
    10,655.92x = 76,976,103.02
  5. Step 5: Solve for x
    x = 76,976,103.02/10,655.92
  6. Step 6: Final answer
    x = 7,223.79

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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.