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Finding the Fourth Proportional to 12,656.88, 18,994.68 and 10,220.88

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Solution

The fourth proportional to 12,656.88, 18,994.68 and 10,220.88 is: 15,338.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.88 : 18,994.68 = 10,220.88 : x
  2. Step 2: Convert to fraction form
    12,656.88/18,994.68 = 10,220.88/x
  3. Step 3: Cross multiply
    12,656.88x = 18,994.68 × 10,220.88
  4. Step 4: Simplify right side
    12,656.88x = 194,142,344.92
  5. Step 5: Solve for x
    x = 194,142,344.92/12,656.88
  6. Step 6: Final answer
    x = 15,338.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.