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Finding the Fourth Proportional to 8,707.28, 12,026.02 and 5,736.40

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Solution

The fourth proportional to 8,707.28, 12,026.02 and 5,736.40 is: 7,922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.28 : 12,026.02 = 5,736.40 : x
  2. Step 2: Convert to fraction form
    8,707.28/12,026.02 = 5,736.40/x
  3. Step 3: Cross multiply
    8,707.28x = 12,026.02 × 5,736.40
  4. Step 4: Simplify right side
    8,707.28x = 68,986,061.13
  5. Step 5: Solve for x
    x = 68,986,061.13/8,707.28
  6. Step 6: Final answer
    x = 7,922.80

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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.