Home / 31,407.50-47,132.85-12,939.50

Finding the Fourth Proportional to 31,407.50, 47,132.85 and 12,939.50

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Solution

The fourth proportional to 31,407.50, 47,132.85 and 12,939.50 is: 19,418.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,407.50 : 47,132.85 = 12,939.50 : x
  2. Step 2: Convert to fraction form
    31,407.50/47,132.85 = 12,939.50/x
  3. Step 3: Cross multiply
    31,407.50x = 47,132.85 × 12,939.50
  4. Step 4: Simplify right side
    31,407.50x = 609,875,512.58
  5. Step 5: Solve for x
    x = 609,875,512.58/31,407.50
  6. Step 6: Final answer
    x = 19,418.15

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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.