Home / 9,388.28-12,955.75-5,139.42

Finding the Fourth Proportional to 9,388.28, 12,955.75 and 5,139.42

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Solution

The fourth proportional to 9,388.28, 12,955.75 and 5,139.42 is: 7,092.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.28 : 12,955.75 = 5,139.42 : x
  2. Step 2: Convert to fraction form
    9,388.28/12,955.75 = 5,139.42/x
  3. Step 3: Cross multiply
    9,388.28x = 12,955.75 × 5,139.42
  4. Step 4: Simplify right side
    9,388.28x = 66,585,040.67
  5. Step 5: Solve for x
    x = 66,585,040.67/9,388.28
  6. Step 6: Final answer
    x = 7,092.36

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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.