Home / 6,624.20-9,920.10-3,157.40

Finding the Fourth Proportional to 6,624.20, 9,920.10 and 3,157.40

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Solution

The fourth proportional to 6,624.20, 9,920.10 and 3,157.40 is: 4,728.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,624.20 : 9,920.10 = 3,157.40 : x
  2. Step 2: Convert to fraction form
    6,624.20/9,920.10 = 3,157.40/x
  3. Step 3: Cross multiply
    6,624.20x = 9,920.10 × 3,157.40
  4. Step 4: Simplify right side
    6,624.20x = 31,321,723.74
  5. Step 5: Solve for x
    x = 31,321,723.74/6,624.20
  6. Step 6: Final answer
    x = 4,728.38

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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.