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Finding the Fourth Proportional to 21,526.62, 29,625.84 and 18,213

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Solution

The fourth proportional to 21,526.62, 29,625.84 and 18,213 is: 25,065.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,526.62 : 29,625.84 = 18,213 : x
  2. Step 2: Convert to fraction form
    21,526.62/29,625.84 = 18,213/x
  3. Step 3: Cross multiply
    21,526.62x = 29,625.84 × 18,213
  4. Step 4: Simplify right side
    21,526.62x = 539,575,423.92
  5. Step 5: Solve for x
    x = 539,575,423.92/21,526.62
  6. Step 6: Final answer
    x = 25,065.50

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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.