Home / 20,490.60-28,266.66-15,773.16

Finding the Fourth Proportional to 20,490.60, 28,266.66 and 15,773.16

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Solution

The fourth proportional to 20,490.60, 28,266.66 and 15,773.16 is: 21,758.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.60 : 28,266.66 = 15,773.16 : x
  2. Step 2: Convert to fraction form
    20,490.60/28,266.66 = 15,773.16/x
  3. Step 3: Cross multiply
    20,490.60x = 28,266.66 × 15,773.16
  4. Step 4: Simplify right side
    20,490.60x = 445,854,550.85
  5. Step 5: Solve for x
    x = 445,854,550.85/20,490.60
  6. Step 6: Final answer
    x = 21,758.98

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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.