Home / 13,278.80-18,318.66-7,964.48

Finding the Fourth Proportional to 13,278.80, 18,318.66 and 7,964.48

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Solution

The fourth proportional to 13,278.80, 18,318.66 and 7,964.48 is: 10,987.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.80 : 18,318.66 = 7,964.48 : x
  2. Step 2: Convert to fraction form
    13,278.80/18,318.66 = 7,964.48/x
  3. Step 3: Cross multiply
    13,278.80x = 18,318.66 × 7,964.48
  4. Step 4: Simplify right side
    13,278.80x = 145,898,601.20
  5. Step 5: Solve for x
    x = 145,898,601.20/13,278.80
  6. Step 6: Final answer
    x = 10,987.33

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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.