Home / 20,994.28-31,490.89-8,510.97

Finding the Fourth Proportional to 20,994.28, 31,490.89 and 8,510.97

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Solution

The fourth proportional to 20,994.28, 31,490.89 and 8,510.97 is: 12,766.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.28 : 31,490.89 = 8,510.97 : x
  2. Step 2: Convert to fraction form
    20,994.28/31,490.89 = 8,510.97/x
  3. Step 3: Cross multiply
    20,994.28x = 31,490.89 × 8,510.97
  4. Step 4: Simplify right side
    20,994.28x = 268,018,020.06
  5. Step 5: Solve for x
    x = 268,018,020.06/20,994.28
  6. Step 6: Final answer
    x = 12,766.24

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1.5x scale

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.