Home / 20,708.55-28,562.76-12,747.87

Finding the Fourth Proportional to 20,708.55, 28,562.76 and 12,747.87

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Solution

The fourth proportional to 20,708.55, 28,562.76 and 12,747.87 is: 17,582.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.55 : 28,562.76 = 12,747.87 : x
  2. Step 2: Convert to fraction form
    20,708.55/28,562.76 = 12,747.87/x
  3. Step 3: Cross multiply
    20,708.55x = 28,562.76 × 12,747.87
  4. Step 4: Simplify right side
    20,708.55x = 364,114,351.32
  5. Step 5: Solve for x
    x = 364,114,351.32/20,708.55
  6. Step 6: Final answer
    x = 17,582.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.