Home / 20,743.18-31,114.63-12,425.56

Finding the Fourth Proportional to 20,743.18, 31,114.63 and 12,425.56

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Solution

The fourth proportional to 20,743.18, 31,114.63 and 12,425.56 is: 18,638.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.18 : 31,114.63 = 12,425.56 : x
  2. Step 2: Convert to fraction form
    20,743.18/31,114.63 = 12,425.56/x
  3. Step 3: Cross multiply
    20,743.18x = 31,114.63 × 12,425.56
  4. Step 4: Simplify right side
    20,743.18x = 386,616,701.94
  5. Step 5: Solve for x
    x = 386,616,701.94/20,743.18
  6. Step 6: Final answer
    x = 18,638.26

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1.5x scale

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.