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Finding the Fourth Proportional to 8,777.28, 12,111.12 and 5,240.28

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Solution

The fourth proportional to 8,777.28, 12,111.12 and 5,240.28 is: 7,230.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,777.28 : 12,111.12 = 5,240.28 : x
  2. Step 2: Convert to fraction form
    8,777.28/12,111.12 = 5,240.28/x
  3. Step 3: Cross multiply
    8,777.28x = 12,111.12 × 5,240.28
  4. Step 4: Simplify right side
    8,777.28x = 63,465,659.91
  5. Step 5: Solve for x
    x = 63,465,659.91/8,777.28
  6. Step 6: Final answer
    x = 7,230.68

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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.