Home / 20,490.91-28,277.17-11,539.28

Finding the Fourth Proportional to 20,490.91, 28,277.17 and 11,539.28

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Solution

The fourth proportional to 20,490.91, 28,277.17 and 11,539.28 is: 15,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.91 : 28,277.17 = 11,539.28 : x
  2. Step 2: Convert to fraction form
    20,490.91/28,277.17 = 11,539.28/x
  3. Step 3: Cross multiply
    20,490.91x = 28,277.17 × 11,539.28
  4. Step 4: Simplify right side
    20,490.91x = 326,298,224.08
  5. Step 5: Solve for x
    x = 326,298,224.08/20,490.91
  6. Step 6: Final answer
    x = 15,924.05

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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.