Home / 20,777.28-31,111.22-12,437.52

Finding the Fourth Proportional to 20,777.28, 31,111.22 and 12,437.52

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Solution

The fourth proportional to 20,777.28, 31,111.22 and 12,437.52 is: 18,623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.28 : 31,111.22 = 12,437.52 : x
  2. Step 2: Convert to fraction form
    20,777.28/31,111.22 = 12,437.52/x
  3. Step 3: Cross multiply
    20,777.28x = 31,111.22 × 12,437.52
  4. Step 4: Simplify right side
    20,777.28x = 386,946,420.97
  5. Step 5: Solve for x
    x = 386,946,420.97/20,777.28
  6. Step 6: Final answer
    x = 18,623.54

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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.