Home / 31,425.68-47,138.40-12,705.49

Finding the Fourth Proportional to 31,425.68, 47,138.40 and 12,705.49

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Solution

The fourth proportional to 31,425.68, 47,138.40 and 12,705.49 is: 19,058.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,425.68 : 47,138.40 = 12,705.49 : x
  2. Step 2: Convert to fraction form
    31,425.68/47,138.40 = 12,705.49/x
  3. Step 3: Cross multiply
    31,425.68x = 47,138.40 × 12,705.49
  4. Step 4: Simplify right side
    31,425.68x = 598,916,170.60
  5. Step 5: Solve for x
    x = 598,916,170.60/31,425.68
  6. Step 6: Final answer
    x = 19,058.18

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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.