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Finding the Fourth Proportional to 12,881.28, 17,765.28 and 8,896.08

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Solution

The fourth proportional to 12,881.28, 17,765.28 and 8,896.08 is: 12,269.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.28 : 17,765.28 = 8,896.08 : x
  2. Step 2: Convert to fraction form
    12,881.28/17,765.28 = 8,896.08/x
  3. Step 3: Cross multiply
    12,881.28x = 17,765.28 × 8,896.08
  4. Step 4: Simplify right side
    12,881.28x = 158,041,352.10
  5. Step 5: Solve for x
    x = 158,041,352.10/12,881.28
  6. Step 6: Final answer
    x = 12,269.07

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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.