Home / 5,247.68-7,240.14-2,978.64

Finding the Fourth Proportional to 5,247.68, 7,240.14 and 2,978.64

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Solution

The fourth proportional to 5,247.68, 7,240.14 and 2,978.64 is: 4,109.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,247.68 : 7,240.14 = 2,978.64 : x
  2. Step 2: Convert to fraction form
    5,247.68/7,240.14 = 2,978.64/x
  3. Step 3: Cross multiply
    5,247.68x = 7,240.14 × 2,978.64
  4. Step 4: Simplify right side
    5,247.68x = 21,565,770.61
  5. Step 5: Solve for x
    x = 21,565,770.61/5,247.68
  6. Step 6: Final answer
    x = 4,109.59

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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.