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Finding the Fourth Proportional to 8,712.90, 13,093.65 and 7,643.70

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Solution

The fourth proportional to 8,712.90, 13,093.65 and 7,643.70 is: 11,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.90 : 13,093.65 = 7,643.70 : x
  2. Step 2: Convert to fraction form
    8,712.90/13,093.65 = 7,643.70/x
  3. Step 3: Cross multiply
    8,712.90x = 13,093.65 × 7,643.70
  4. Step 4: Simplify right side
    8,712.90x = 100,083,932.51
  5. Step 5: Solve for x
    x = 100,083,932.51/8,712.90
  6. Step 6: Final answer
    x = 11,486.87

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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.