Home / 15,056.76-20,781.23-8,687.46

Finding the Fourth Proportional to 15,056.76, 20,781.23 and 8,687.46

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Solution

The fourth proportional to 15,056.76, 20,781.23 and 8,687.46 is: 11,990.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,056.76 : 20,781.23 = 8,687.46 : x
  2. Step 2: Convert to fraction form
    15,056.76/20,781.23 = 8,687.46/x
  3. Step 3: Cross multiply
    15,056.76x = 20,781.23 × 8,687.46
  4. Step 4: Simplify right side
    15,056.76x = 180,536,060.94
  5. Step 5: Solve for x
    x = 180,536,060.94/15,056.76
  6. Step 6: Final answer
    x = 11,990.37

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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.