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Finding the Fourth Proportional to 7,515.76, 10,371.76 and 4,158.71

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Solution

The fourth proportional to 7,515.76, 10,371.76 and 4,158.71 is: 5,739.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515.76 : 10,371.76 = 4,158.71 : x
  2. Step 2: Convert to fraction form
    7,515.76/10,371.76 = 4,158.71/x
  3. Step 3: Cross multiply
    7,515.76x = 10,371.76 × 4,158.71
  4. Step 4: Simplify right side
    7,515.76x = 43,133,157.56
  5. Step 5: Solve for x
    x = 43,133,157.56/7,515.76
  6. Step 6: Final answer
    x = 5,739.03

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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.