Home / 6,989.76-9,637.92-5,215.68

Finding the Fourth Proportional to 6,989.76, 9,637.92 and 5,215.68

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Solution

The fourth proportional to 6,989.76, 9,637.92 and 5,215.68 is: 7,191.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,989.76 : 9,637.92 = 5,215.68 : x
  2. Step 2: Convert to fraction form
    6,989.76/9,637.92 = 5,215.68/x
  3. Step 3: Cross multiply
    6,989.76x = 9,637.92 × 5,215.68
  4. Step 4: Simplify right side
    6,989.76x = 50,268,306.59
  5. Step 5: Solve for x
    x = 50,268,306.59/6,989.76
  6. Step 6: Final answer
    x = 7,191.71

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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.