Home / 7,177.40-9,904.65-3,990.69

Finding the Fourth Proportional to 7,177.40, 9,904.65 and 3,990.69

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Solution

The fourth proportional to 7,177.40, 9,904.65 and 3,990.69 is: 5,507.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,177.40 : 9,904.65 = 3,990.69 : x
  2. Step 2: Convert to fraction form
    7,177.40/9,904.65 = 3,990.69/x
  3. Step 3: Cross multiply
    7,177.40x = 9,904.65 × 3,990.69
  4. Step 4: Simplify right side
    7,177.40x = 39,526,387.71
  5. Step 5: Solve for x
    x = 39,526,387.71/7,177.40
  6. Step 6: Final answer
    x = 5,507.07

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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.