Home / 5,247.86-7,240.40-2,978.82

Finding the Fourth Proportional to 5,247.86, 7,240.40 and 2,978.82

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Solution

The fourth proportional to 5,247.86, 7,240.40 and 2,978.82 is: 4,109.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,247.86 : 7,240.40 = 2,978.82 : x
  2. Step 2: Convert to fraction form
    5,247.86/7,240.40 = 2,978.82/x
  3. Step 3: Cross multiply
    5,247.86x = 7,240.40 × 2,978.82
  4. Step 4: Simplify right side
    5,247.86x = 21,567,855.78
  5. Step 5: Solve for x
    x = 21,567,855.78/5,247.86
  6. Step 6: Final answer
    x = 4,109.84

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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.