Home / 31,419.20-47,128.80-15,867.20

Finding the Fourth Proportional to 31,419.20, 47,128.80 and 15,867.20

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Solution

The fourth proportional to 31,419.20, 47,128.80 and 15,867.20 is: 23,800.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,419.20 : 47,128.80 = 15,867.20 : x
  2. Step 2: Convert to fraction form
    31,419.20/47,128.80 = 15,867.20/x
  3. Step 3: Cross multiply
    31,419.20x = 47,128.80 × 15,867.20
  4. Step 4: Simplify right side
    31,419.20x = 747,802,095.36
  5. Step 5: Solve for x
    x = 747,802,095.36/31,419.20
  6. Step 6: Final answer
    x = 23,800.80

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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.