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Finding the Fourth Proportional to 12,685.17, 19,006.98 and 6,755.76

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Solution

The fourth proportional to 12,685.17, 19,006.98 and 6,755.76 is: 10,122.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.17 : 19,006.98 = 6,755.76 : x
  2. Step 2: Convert to fraction form
    12,685.17/19,006.98 = 6,755.76/x
  3. Step 3: Cross multiply
    12,685.17x = 19,006.98 × 6,755.76
  4. Step 4: Simplify right side
    12,685.17x = 128,406,569.87
  5. Step 5: Solve for x
    x = 128,406,569.87/12,685.17
  6. Step 6: Final answer
    x = 10,122.58

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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.