Home / 10,008.80-15,013.92-5,390.72

Finding the Fourth Proportional to 10,008.80, 15,013.92 and 5,390.72

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Solution

The fourth proportional to 10,008.80, 15,013.92 and 5,390.72 is: 8,086.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,008.80 : 15,013.92 = 5,390.72 : x
  2. Step 2: Convert to fraction form
    10,008.80/15,013.92 = 5,390.72/x
  3. Step 3: Cross multiply
    10,008.80x = 15,013.92 × 5,390.72
  4. Step 4: Simplify right side
    10,008.80x = 80,935,838.82
  5. Step 5: Solve for x
    x = 80,935,838.82/10,008.80
  6. Step 6: Final answer
    x = 8,086.47

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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.