Home / 13,517.12-18,658.08-7,928

Finding the Fourth Proportional to 13,517.12, 18,658.08 and 7,928

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Solution

The fourth proportional to 13,517.12, 18,658.08 and 7,928 is: 10,943.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.12 : 18,658.08 = 7,928 : x
  2. Step 2: Convert to fraction form
    13,517.12/18,658.08 = 7,928/x
  3. Step 3: Cross multiply
    13,517.12x = 18,658.08 × 7,928
  4. Step 4: Simplify right side
    13,517.12x = 147,921,258.24
  5. Step 5: Solve for x
    x = 147,921,258.24/13,517.12
  6. Step 6: Final answer
    x = 10,943.25

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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.