Home / 31,987.68-47,985.56-10,931.72

Finding the Fourth Proportional to 31,987.68, 47,985.56 and 10,931.72

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Solution

The fourth proportional to 31,987.68, 47,985.56 and 10,931.72 is: 16,398.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,987.68 : 47,985.56 = 10,931.72 : x
  2. Step 2: Convert to fraction form
    31,987.68/47,985.56 = 10,931.72/x
  3. Step 3: Cross multiply
    31,987.68x = 47,985.56 × 10,931.72
  4. Step 4: Simplify right side
    31,987.68x = 524,564,705.96
  5. Step 5: Solve for x
    x = 524,564,705.96/31,987.68
  6. Step 6: Final answer
    x = 16,398.96

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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.