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Finding the Fourth Proportional to 12,928.68, 19,402.68 and 8,758.80

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Solution

The fourth proportional to 12,928.68, 19,402.68 and 8,758.80 is: 13,144.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.68 : 19,402.68 = 8,758.80 : x
  2. Step 2: Convert to fraction form
    12,928.68/19,402.68 = 8,758.80/x
  3. Step 3: Cross multiply
    12,928.68x = 19,402.68 × 8,758.80
  4. Step 4: Simplify right side
    12,928.68x = 169,944,193.58
  5. Step 5: Solve for x
    x = 169,944,193.58/12,928.68
  6. Step 6: Final answer
    x = 13,144.74

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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.