Home / 31,385.07-47,080.04-13,851.81

Finding the Fourth Proportional to 31,385.07, 47,080.04 and 13,851.81

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Solution

The fourth proportional to 31,385.07, 47,080.04 and 13,851.81 is: 20,778.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,385.07 : 47,080.04 = 13,851.81 : x
  2. Step 2: Convert to fraction form
    31,385.07/47,080.04 = 13,851.81/x
  3. Step 3: Cross multiply
    31,385.07x = 47,080.04 × 13,851.81
  4. Step 4: Simplify right side
    31,385.07x = 652,143,699.61
  5. Step 5: Solve for x
    x = 652,143,699.61/31,385.07
  6. Step 6: Final answer
    x = 20,778.79

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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.