Home / 20,990.20-31,490.46-6,199.04

Finding the Fourth Proportional to 20,990.20, 31,490.46 and 6,199.04

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Solution

The fourth proportional to 20,990.20, 31,490.46 and 6,199.04 is: 9,300.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.20 : 31,490.46 = 6,199.04 : x
  2. Step 2: Convert to fraction form
    20,990.20/31,490.46 = 6,199.04/x
  3. Step 3: Cross multiply
    20,990.20x = 31,490.46 × 6,199.04
  4. Step 4: Simplify right side
    20,990.20x = 195,210,621.16
  5. Step 5: Solve for x
    x = 195,210,621.16/20,990.20
  6. Step 6: Final answer
    x = 9,300.08

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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.