Home / 20,777.19-31,142.70-15,830.52

Finding the Fourth Proportional to 20,777.19, 31,142.70 and 15,830.52

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Solution

The fourth proportional to 20,777.19, 31,142.70 and 15,830.52 is: 23,728.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.19 : 31,142.70 = 15,830.52 : x
  2. Step 2: Convert to fraction form
    20,777.19/31,142.70 = 15,830.52/x
  3. Step 3: Cross multiply
    20,777.19x = 31,142.70 × 15,830.52
  4. Step 4: Simplify right side
    20,777.19x = 493,005,135.20
  5. Step 5: Solve for x
    x = 493,005,135.20/20,777.19
  6. Step 6: Final answer
    x = 23,728.19

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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.