Home / 20,994.20-31,490.81-8,510.89

Finding the Fourth Proportional to 20,994.20, 31,490.81 and 8,510.89

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Solution

The fourth proportional to 20,994.20, 31,490.81 and 8,510.89 is: 12,766.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.20 : 31,490.81 = 8,510.89 : x
  2. Step 2: Convert to fraction form
    20,994.20/31,490.81 = 8,510.89/x
  3. Step 3: Cross multiply
    20,994.20x = 31,490.81 × 8,510.89
  4. Step 4: Simplify right side
    20,994.20x = 268,014,641.19
  5. Step 5: Solve for x
    x = 268,014,641.19/20,994.20
  6. Step 6: Final answer
    x = 12,766.13

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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.