Home / 20,923.60-31,356.24-15,723.40

Finding the Fourth Proportional to 20,923.60, 31,356.24 and 15,723.40

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Solution

The fourth proportional to 20,923.60, 31,356.24 and 15,723.40 is: 23,563.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.60 : 31,356.24 = 15,723.40 : x
  2. Step 2: Convert to fraction form
    20,923.60/31,356.24 = 15,723.40/x
  3. Step 3: Cross multiply
    20,923.60x = 31,356.24 × 15,723.40
  4. Step 4: Simplify right side
    20,923.60x = 493,026,704.02
  5. Step 5: Solve for x
    x = 493,026,704.02/20,923.60
  6. Step 6: Final answer
    x = 23,563.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.