Home / 10,047.28-15,070.72-3,121.76

Finding the Fourth Proportional to 10,047.28, 15,070.72 and 3,121.76

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Solution

The fourth proportional to 10,047.28, 15,070.72 and 3,121.76 is: 4,682.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,047.28 : 15,070.72 = 3,121.76 : x
  2. Step 2: Convert to fraction form
    10,047.28/15,070.72 = 3,121.76/x
  3. Step 3: Cross multiply
    10,047.28x = 15,070.72 × 3,121.76
  4. Step 4: Simplify right side
    10,047.28x = 47,047,170.87
  5. Step 5: Solve for x
    x = 47,047,170.87/10,047.28
  6. Step 6: Final answer
    x = 4,682.58

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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.