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Finding the Fourth Proportional to 21,641.75, 29,799.00 and 18,447.89

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Solution

The fourth proportional to 21,641.75, 29,799.00 and 18,447.89 is: 25,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.75 : 29,799.00 = 18,447.89 : x
  2. Step 2: Convert to fraction form
    21,641.75/29,799.00 = 18,447.89/x
  3. Step 3: Cross multiply
    21,641.75x = 29,799.00 × 18,447.89
  4. Step 4: Simplify right side
    21,641.75x = 549,728,473.23
  5. Step 5: Solve for x
    x = 549,728,473.23/21,641.75
  6. Step 6: Final answer
    x = 25,401.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.