Home / 20,566.85-28,382.31-11,135.39

Finding the Fourth Proportional to 20,566.85, 28,382.31 and 11,135.39

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Solution

The fourth proportional to 20,566.85, 28,382.31 and 11,135.39 is: 15,366.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,566.85 : 28,382.31 = 11,135.39 : x
  2. Step 2: Convert to fraction form
    20,566.85/28,382.31 = 11,135.39/x
  3. Step 3: Cross multiply
    20,566.85x = 28,382.31 × 11,135.39
  4. Step 4: Simplify right side
    20,566.85x = 316,047,949.04
  5. Step 5: Solve for x
    x = 316,047,949.04/20,566.85
  6. Step 6: Final answer
    x = 15,366.87

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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.