Home / 31,426.74-47,139.99-12,706.55

Finding the Fourth Proportional to 31,426.74, 47,139.99 and 12,706.55

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Solution

The fourth proportional to 31,426.74, 47,139.99 and 12,706.55 is: 19,059.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,426.74 : 47,139.99 = 12,706.55 : x
  2. Step 2: Convert to fraction form
    31,426.74/47,139.99 = 12,706.55/x
  3. Step 3: Cross multiply
    31,426.74x = 47,139.99 × 12,706.55
  4. Step 4: Simplify right side
    31,426.74x = 598,986,726.02
  5. Step 5: Solve for x
    x = 598,986,726.02/31,426.74
  6. Step 6: Final answer
    x = 19,059.78

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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.