Home / 31,989.16-47,986.17-8,615.80

Finding the Fourth Proportional to 31,989.16, 47,986.17 and 8,615.80

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Solution

The fourth proportional to 31,989.16, 47,986.17 and 8,615.80 is: 12,924.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,989.16 : 47,986.17 = 8,615.80 : x
  2. Step 2: Convert to fraction form
    31,989.16/47,986.17 = 8,615.80/x
  3. Step 3: Cross multiply
    31,989.16x = 47,986.17 × 8,615.80
  4. Step 4: Simplify right side
    31,989.16x = 413,439,243.49
  5. Step 5: Solve for x
    x = 413,439,243.49/31,989.16
  6. Step 6: Final answer
    x = 12,924.35

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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.