Home / 8,240.80-12,344.40-5,111.20

Finding the Fourth Proportional to 8,240.80, 12,344.40 and 5,111.20

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Solution

The fourth proportional to 8,240.80, 12,344.40 and 5,111.20 is: 7,656.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.80 : 12,344.40 = 5,111.20 : x
  2. Step 2: Convert to fraction form
    8,240.80/12,344.40 = 5,111.20/x
  3. Step 3: Cross multiply
    8,240.80x = 12,344.40 × 5,111.20
  4. Step 4: Simplify right side
    8,240.80x = 63,094,697.28
  5. Step 5: Solve for x
    x = 63,094,697.28/8,240.80
  6. Step 6: Final answer
    x = 7,656.38

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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.