Home / 6,990.20-9,646.46-4,005.90

Finding the Fourth Proportional to 6,990.20, 9,646.46 and 4,005.90

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Solution

The fourth proportional to 6,990.20, 9,646.46 and 4,005.90 is: 5,528.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.20 : 9,646.46 = 4,005.90 : x
  2. Step 2: Convert to fraction form
    6,990.20/9,646.46 = 4,005.90/x
  3. Step 3: Cross multiply
    6,990.20x = 9,646.46 × 4,005.90
  4. Step 4: Simplify right side
    6,990.20x = 38,642,754.11
  5. Step 5: Solve for x
    x = 38,642,754.11/6,990.20
  6. Step 6: Final answer
    x = 5,528.13

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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.