Home / 28,932.40-43,366.20-12,289.60

Finding the Fourth Proportional to 28,932.40, 43,366.20 and 12,289.60

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Solution

The fourth proportional to 28,932.40, 43,366.20 and 12,289.60 is: 18,420.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,932.40 : 43,366.20 = 12,289.60 : x
  2. Step 2: Convert to fraction form
    28,932.40/43,366.20 = 12,289.60/x
  3. Step 3: Cross multiply
    28,932.40x = 43,366.20 × 12,289.60
  4. Step 4: Simplify right side
    28,932.40x = 532,953,251.52
  5. Step 5: Solve for x
    x = 532,953,251.52/28,932.40
  6. Step 6: Final answer
    x = 18,420.64

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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.