Home / 20,729.60-28,605.80-11,775.92

Finding the Fourth Proportional to 20,729.60, 28,605.80 and 11,775.92

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Solution

The fourth proportional to 20,729.60, 28,605.80 and 11,775.92 is: 16,250.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.60 : 28,605.80 = 11,775.92 : x
  2. Step 2: Convert to fraction form
    20,729.60/28,605.80 = 11,775.92/x
  3. Step 3: Cross multiply
    20,729.60x = 28,605.80 × 11,775.92
  4. Step 4: Simplify right side
    20,729.60x = 336,859,612.34
  5. Step 5: Solve for x
    x = 336,859,612.34/20,729.60
  6. Step 6: Final answer
    x = 16,250.17

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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.