Home / 20,742.93-31,114.26-12,425.31

Finding the Fourth Proportional to 20,742.93, 31,114.26 and 12,425.31

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Solution

The fourth proportional to 20,742.93, 31,114.26 and 12,425.31 is: 18,637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.93 : 31,114.26 = 12,425.31 : x
  2. Step 2: Convert to fraction form
    20,742.93/31,114.26 = 12,425.31/x
  3. Step 3: Cross multiply
    20,742.93x = 31,114.26 × 12,425.31
  4. Step 4: Simplify right side
    20,742.93x = 386,604,325.92
  5. Step 5: Solve for x
    x = 386,604,325.92/20,742.93
  6. Step 6: Final answer
    x = 18,637.88

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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.