Home / 10,121.40-15,182.10-5,747.40

Finding the Fourth Proportional to 10,121.40, 15,182.10 and 5,747.40

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Solution

The fourth proportional to 10,121.40, 15,182.10 and 5,747.40 is: 8,621.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.40 : 15,182.10 = 5,747.40 : x
  2. Step 2: Convert to fraction form
    10,121.40/15,182.10 = 5,747.40/x
  3. Step 3: Cross multiply
    10,121.40x = 15,182.10 × 5,747.40
  4. Step 4: Simplify right side
    10,121.40x = 87,257,601.54
  5. Step 5: Solve for x
    x = 87,257,601.54/10,121.40
  6. Step 6: Final answer
    x = 8,621.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.