Home / 28,437.20-39,243.32-15,861.95

Finding the Fourth Proportional to 28,437.20, 39,243.32 and 15,861.95

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Solution

The fourth proportional to 28,437.20, 39,243.32 and 15,861.95 is: 21,889.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.20 : 39,243.32 = 15,861.95 : x
  2. Step 2: Convert to fraction form
    28,437.20/39,243.32 = 15,861.95/x
  3. Step 3: Cross multiply
    28,437.20x = 39,243.32 × 15,861.95
  4. Step 4: Simplify right side
    28,437.20x = 622,475,304.15
  5. Step 5: Solve for x
    x = 622,475,304.15/28,437.20
  6. Step 6: Final answer
    x = 21,889.48

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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.