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Finding the Fourth Proportional to 12,697.13, 17,503.78 and 8,908.56

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Solution

The fourth proportional to 12,697.13, 17,503.78 and 8,908.56 is: 12,281.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,697.13 : 17,503.78 = 8,908.56 : x
  2. Step 2: Convert to fraction form
    12,697.13/17,503.78 = 8,908.56/x
  3. Step 3: Cross multiply
    12,697.13x = 17,503.78 × 8,908.56
  4. Step 4: Simplify right side
    12,697.13x = 155,933,474.36
  5. Step 5: Solve for x
    x = 155,933,474.36/12,697.13
  6. Step 6: Final answer
    x = 12,281.00

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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.