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Finding the Fourth Proportional to 8,690.68, 13,026.30 and 5,230.36

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Solution

The fourth proportional to 8,690.68, 13,026.30 and 5,230.36 is: 7,839.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.68 : 13,026.30 = 5,230.36 : x
  2. Step 2: Convert to fraction form
    8,690.68/13,026.30 = 5,230.36/x
  3. Step 3: Cross multiply
    8,690.68x = 13,026.30 × 5,230.36
  4. Step 4: Simplify right side
    8,690.68x = 68,132,238.47
  5. Step 5: Solve for x
    x = 68,132,238.47/8,690.68
  6. Step 6: Final answer
    x = 7,839.69

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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.