Home / 31,615.10-47,375.72-12,872.21

Finding the Fourth Proportional to 31,615.10, 47,375.72 and 12,872.21

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Solution

The fourth proportional to 31,615.10, 47,375.72 and 12,872.21 is: 19,289.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615.10 : 47,375.72 = 12,872.21 : x
  2. Step 2: Convert to fraction form
    31,615.10/47,375.72 = 12,872.21/x
  3. Step 3: Cross multiply
    31,615.10x = 47,375.72 × 12,872.21
  4. Step 4: Simplify right side
    31,615.10x = 609,829,963.77
  5. Step 5: Solve for x
    x = 609,829,963.77/31,615.10
  6. Step 6: Final answer
    x = 19,289.20

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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.