Home / 20,742.18-31,113.14-12,424.56

Finding the Fourth Proportional to 20,742.18, 31,113.14 and 12,424.56

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Solution

The fourth proportional to 20,742.18, 31,113.14 and 12,424.56 is: 18,636.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.18 : 31,113.14 = 12,424.56 : x
  2. Step 2: Convert to fraction form
    20,742.18/31,113.14 = 12,424.56/x
  3. Step 3: Cross multiply
    20,742.18x = 31,113.14 × 12,424.56
  4. Step 4: Simplify right side
    20,742.18x = 386,567,012.60
  5. Step 5: Solve for x
    x = 386,567,012.60/20,742.18
  6. Step 6: Final answer
    x = 18,636.76

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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.