Home / 20,989.32-28,964.92-12,036.60

Finding the Fourth Proportional to 20,989.32, 28,964.92 and 12,036.60

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Solution

The fourth proportional to 20,989.32, 28,964.92 and 12,036.60 is: 16,610.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.32 : 28,964.92 = 12,036.60 : x
  2. Step 2: Convert to fraction form
    20,989.32/28,964.92 = 12,036.60/x
  3. Step 3: Cross multiply
    20,989.32x = 28,964.92 × 12,036.60
  4. Step 4: Simplify right side
    20,989.32x = 348,639,156.07
  5. Step 5: Solve for x
    x = 348,639,156.07/20,989.32
  6. Step 6: Final answer
    x = 16,610.31

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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.