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Finding the Fourth Proportional to 21,659.55, 32,490.21 and 6,868.14

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Solution

The fourth proportional to 21,659.55, 32,490.21 and 6,868.14 is: 10,302.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.55 : 32,490.21 = 6,868.14 : x
  2. Step 2: Convert to fraction form
    21,659.55/32,490.21 = 6,868.14/x
  3. Step 3: Cross multiply
    21,659.55x = 32,490.21 × 6,868.14
  4. Step 4: Simplify right side
    21,659.55x = 223,147,310.91
  5. Step 5: Solve for x
    x = 223,147,310.91/21,659.55
  6. Step 6: Final answer
    x = 10,302.49

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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.