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Finding the Fourth Proportional to 12,699.18, 19,077.97 and 8,959.57

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Solution

The fourth proportional to 12,699.18, 19,077.97 and 8,959.57 is: 13,459.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.18 : 19,077.97 = 8,959.57 : x
  2. Step 2: Convert to fraction form
    12,699.18/19,077.97 = 8,959.57/x
  3. Step 3: Cross multiply
    12,699.18x = 19,077.97 × 8,959.57
  4. Step 4: Simplify right side
    12,699.18x = 170,930,312.28
  5. Step 5: Solve for x
    x = 170,930,312.28/12,699.18
  6. Step 6: Final answer
    x = 13,459.95

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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.