Home / 13,125.18-18,112.35-7,156.97

Finding the Fourth Proportional to 13,125.18, 18,112.35 and 7,156.97

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Solution

The fourth proportional to 13,125.18, 18,112.35 and 7,156.97 is: 9,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.18 : 18,112.35 = 7,156.97 : x
  2. Step 2: Convert to fraction form
    13,125.18/18,112.35 = 7,156.97/x
  3. Step 3: Cross multiply
    13,125.18x = 18,112.35 × 7,156.97
  4. Step 4: Simplify right side
    13,125.18x = 129,629,549.78
  5. Step 5: Solve for x
    x = 129,629,549.78/13,125.18
  6. Step 6: Final answer
    x = 9,876.40

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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.