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Finding the Fourth Proportional to 12,689.70, 19,034.55 and 6,843.30

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Solution

The fourth proportional to 12,689.70, 19,034.55 and 6,843.30 is: 10,264.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.70 : 19,034.55 = 6,843.30 : x
  2. Step 2: Convert to fraction form
    12,689.70/19,034.55 = 6,843.30/x
  3. Step 3: Cross multiply
    12,689.70x = 19,034.55 × 6,843.30
  4. Step 4: Simplify right side
    12,689.70x = 130,259,136.02
  5. Step 5: Solve for x
    x = 130,259,136.02/12,689.70
  6. Step 6: Final answer
    x = 10,264.95

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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.