Home / 31,881.06-47,802.15-12,138.53

Finding the Fourth Proportional to 31,881.06, 47,802.15 and 12,138.53

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Solution

The fourth proportional to 31,881.06, 47,802.15 and 12,138.53 is: 18,200.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,881.06 : 47,802.15 = 12,138.53 : x
  2. Step 2: Convert to fraction form
    31,881.06/47,802.15 = 12,138.53/x
  3. Step 3: Cross multiply
    31,881.06x = 47,802.15 × 12,138.53
  4. Step 4: Simplify right side
    31,881.06x = 580,247,592.83
  5. Step 5: Solve for x
    x = 580,247,592.83/31,881.06
  6. Step 6: Final answer
    x = 18,200.39

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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.