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Finding the Fourth Proportional to 8,885.28, 12,262.86 and 5,159.28

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Solution

The fourth proportional to 8,885.28, 12,262.86 and 5,159.28 is: 7,120.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.28 : 12,262.86 = 5,159.28 : x
  2. Step 2: Convert to fraction form
    8,885.28/12,262.86 = 5,159.28/x
  3. Step 3: Cross multiply
    8,885.28x = 12,262.86 × 5,159.28
  4. Step 4: Simplify right side
    8,885.28x = 63,267,528.34
  5. Step 5: Solve for x
    x = 63,267,528.34/8,885.28
  6. Step 6: Final answer
    x = 7,120.49

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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.