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Finding the Fourth Proportional to 21,486.97, 32,230.87 and 7,447.45

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Solution

The fourth proportional to 21,486.97, 32,230.87 and 7,447.45 is: 11,171.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,486.97 : 32,230.87 = 7,447.45 : x
  2. Step 2: Convert to fraction form
    21,486.97/32,230.87 = 7,447.45/x
  3. Step 3: Cross multiply
    21,486.97x = 32,230.87 × 7,447.45
  4. Step 4: Simplify right side
    21,486.97x = 240,037,795.91
  5. Step 5: Solve for x
    x = 240,037,795.91/21,486.97
  6. Step 6: Final answer
    x = 11,171.32

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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.