Home / 15,777.20-21,772.44-8,703.56

Finding the Fourth Proportional to 15,777.20, 21,772.44 and 8,703.56

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Solution

The fourth proportional to 15,777.20, 21,772.44 and 8,703.56 is: 12,010.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.20 : 21,772.44 = 8,703.56 : x
  2. Step 2: Convert to fraction form
    15,777.20/21,772.44 = 8,703.56/x
  3. Step 3: Cross multiply
    15,777.20x = 21,772.44 × 8,703.56
  4. Step 4: Simplify right side
    15,777.20x = 189,497,737.89
  5. Step 5: Solve for x
    x = 189,497,737.89/15,777.20
  6. Step 6: Final answer
    x = 12,010.86

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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.