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Finding the Fourth Proportional to 12,691.72, 17,515.44 and 7,026.70

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Solution

The fourth proportional to 12,691.72, 17,515.44 and 7,026.70 is: 9,697.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.72 : 17,515.44 = 7,026.70 : x
  2. Step 2: Convert to fraction form
    12,691.72/17,515.44 = 7,026.70/x
  3. Step 3: Cross multiply
    12,691.72x = 17,515.44 × 7,026.70
  4. Step 4: Simplify right side
    12,691.72x = 123,075,742.25
  5. Step 5: Solve for x
    x = 123,075,742.25/12,691.72
  6. Step 6: Final answer
    x = 9,697.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.