Home / 20,708.48-31,062.60-12,390.82

Finding the Fourth Proportional to 20,708.48, 31,062.60 and 12,390.82

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Solution

The fourth proportional to 20,708.48, 31,062.60 and 12,390.82 is: 18,586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.48 : 31,062.60 = 12,390.82 : x
  2. Step 2: Convert to fraction form
    20,708.48/31,062.60 = 12,390.82/x
  3. Step 3: Cross multiply
    20,708.48x = 31,062.60 × 12,390.82
  4. Step 4: Simplify right side
    20,708.48x = 384,891,007.68
  5. Step 5: Solve for x
    x = 384,891,007.68/20,708.48
  6. Step 6: Final answer
    x = 18,586.15

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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.