Home / 20,449.40-28,218.63-11,495.15

Finding the Fourth Proportional to 20,449.40, 28,218.63 and 11,495.15

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Solution

The fourth proportional to 20,449.40, 28,218.63 and 11,495.15 is: 15,862.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.40 : 28,218.63 = 11,495.15 : x
  2. Step 2: Convert to fraction form
    20,449.40/28,218.63 = 11,495.15/x
  3. Step 3: Cross multiply
    20,449.40x = 28,218.63 × 11,495.15
  4. Step 4: Simplify right side
    20,449.40x = 324,377,327.82
  5. Step 5: Solve for x
    x = 324,377,327.82/20,449.40
  6. Step 6: Final answer
    x = 15,862.44

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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.