Home / 20,321.60-28,043.26-11,370.10

Finding the Fourth Proportional to 20,321.60, 28,043.26 and 11,370.10

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Solution

The fourth proportional to 20,321.60, 28,043.26 and 11,370.10 is: 15,690.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.60 : 28,043.26 = 11,370.10 : x
  2. Step 2: Convert to fraction form
    20,321.60/28,043.26 = 11,370.10/x
  3. Step 3: Cross multiply
    20,321.60x = 28,043.26 × 11,370.10
  4. Step 4: Simplify right side
    20,321.60x = 318,854,670.53
  5. Step 5: Solve for x
    x = 318,854,670.53/20,321.60
  6. Step 6: Final answer
    x = 15,690.43

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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.