Home / 20,490.32-28,279.33-11,539.57

Finding the Fourth Proportional to 20,490.32, 28,279.33 and 11,539.57

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Solution

The fourth proportional to 20,490.32, 28,279.33 and 11,539.57 is: 15,926.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.32 : 28,279.33 = 11,539.57 : x
  2. Step 2: Convert to fraction form
    20,490.32/28,279.33 = 11,539.57/x
  3. Step 3: Cross multiply
    20,490.32x = 28,279.33 × 11,539.57
  4. Step 4: Simplify right side
    20,490.32x = 326,331,208.54
  5. Step 5: Solve for x
    x = 326,331,208.54/20,490.32
  6. Step 6: Final answer
    x = 15,926.12

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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.