Home / 20,499.60-28,290.82-11,426.36

Finding the Fourth Proportional to 20,499.60, 28,290.82 and 11,426.36

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Solution

The fourth proportional to 20,499.60, 28,290.82 and 11,426.36 is: 15,769.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.60 : 28,290.82 = 11,426.36 : x
  2. Step 2: Convert to fraction form
    20,499.60/28,290.82 = 11,426.36/x
  3. Step 3: Cross multiply
    20,499.60x = 28,290.82 × 11,426.36
  4. Step 4: Simplify right side
    20,499.60x = 323,261,094.02
  5. Step 5: Solve for x
    x = 323,261,094.02/20,499.60
  6. Step 6: Final answer
    x = 15,769.14

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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.