Home / 31,721.70-47,567.36-10,655.90

Finding the Fourth Proportional to 31,721.70, 47,567.36 and 10,655.90

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Solution

The fourth proportional to 31,721.70, 47,567.36 and 10,655.90 is: 15,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,721.70 : 47,567.36 = 10,655.90 : x
  2. Step 2: Convert to fraction form
    31,721.70/47,567.36 = 10,655.90/x
  3. Step 3: Cross multiply
    31,721.70x = 47,567.36 × 10,655.90
  4. Step 4: Simplify right side
    31,721.70x = 506,873,031.42
  5. Step 5: Solve for x
    x = 506,873,031.42/31,721.70
  6. Step 6: Final answer
    x = 15,978.75

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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.