Home / 20,845.60-31,282.80-15,007.20

Finding the Fourth Proportional to 20,845.60, 31,282.80 and 15,007.20

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Solution

The fourth proportional to 20,845.60, 31,282.80 and 15,007.20 is: 22,521.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.60 : 31,282.80 = 15,007.20 : x
  2. Step 2: Convert to fraction form
    20,845.60/31,282.80 = 15,007.20/x
  3. Step 3: Cross multiply
    20,845.60x = 31,282.80 × 15,007.20
  4. Step 4: Simplify right side
    20,845.60x = 469,467,236.16
  5. Step 5: Solve for x
    x = 469,467,236.16/20,845.60
  6. Step 6: Final answer
    x = 22,521.17

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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.