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Finding the Fourth Proportional to 21,611.20, 32,416.80 and 17,966.20

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Solution

The fourth proportional to 21,611.20, 32,416.80 and 17,966.20 is: 26,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.20 : 32,416.80 = 17,966.20 : x
  2. Step 2: Convert to fraction form
    21,611.20/32,416.80 = 17,966.20/x
  3. Step 3: Cross multiply
    21,611.20x = 32,416.80 × 17,966.20
  4. Step 4: Simplify right side
    21,611.20x = 582,406,712.16
  5. Step 5: Solve for x
    x = 582,406,712.16/21,611.20
  6. Step 6: Final answer
    x = 26,949.30

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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.