Home / 20,321.31-28,043.16-11,368.79

Finding the Fourth Proportional to 20,321.31, 28,043.16 and 11,368.79

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Solution

The fourth proportional to 20,321.31, 28,043.16 and 11,368.79 is: 15,688.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.31 : 28,043.16 = 11,368.79 : x
  2. Step 2: Convert to fraction form
    20,321.31/28,043.16 = 11,368.79/x
  3. Step 3: Cross multiply
    20,321.31x = 28,043.16 × 11,368.79
  4. Step 4: Simplify right side
    20,321.31x = 318,816,656.76
  5. Step 5: Solve for x
    x = 318,816,656.76/20,321.31
  6. Step 6: Final answer
    x = 15,688.78

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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.