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Finding the Fourth Proportional to 12,689.91, 19,034.87 and 8,017.02

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Solution

The fourth proportional to 12,689.91, 19,034.87 and 8,017.02 is: 12,025.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.91 : 19,034.87 = 8,017.02 : x
  2. Step 2: Convert to fraction form
    12,689.91/19,034.87 = 8,017.02/x
  3. Step 3: Cross multiply
    12,689.91x = 19,034.87 × 8,017.02
  4. Step 4: Simplify right side
    12,689.91x = 152,602,893.40
  5. Step 5: Solve for x
    x = 152,602,893.40/12,689.91
  6. Step 6: Final answer
    x = 12,025.53

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Similar ratio
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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.