Home / 12,988.78-19,487.68-4,105.46

Finding the Fourth Proportional to 12,988.78, 19,487.68 and 4,105.46

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Solution

The fourth proportional to 12,988.78, 19,487.68 and 4,105.46 is: 6,159.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.78 : 19,487.68 = 4,105.46 : x
  2. Step 2: Convert to fraction form
    12,988.78/19,487.68 = 4,105.46/x
  3. Step 3: Cross multiply
    12,988.78x = 19,487.68 × 4,105.46
  4. Step 4: Simplify right side
    12,988.78x = 80,005,890.73
  5. Step 5: Solve for x
    x = 80,005,890.73/12,988.78
  6. Step 6: Final answer
    x = 6,159.62

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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.