Home / 20,490.64-28,276.82-11,539.04

Finding the Fourth Proportional to 20,490.64, 28,276.82 and 11,539.04

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Solution

The fourth proportional to 20,490.64, 28,276.82 and 11,539.04 is: 15,923.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.64 : 28,276.82 = 11,539.04 : x
  2. Step 2: Convert to fraction form
    20,490.64/28,276.82 = 11,539.04/x
  3. Step 3: Cross multiply
    20,490.64x = 28,276.82 × 11,539.04
  4. Step 4: Simplify right side
    20,490.64x = 326,287,357.05
  5. Step 5: Solve for x
    x = 326,287,357.05/20,490.64
  6. Step 6: Final answer
    x = 15,923.73

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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.