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Finding the Fourth Proportional to 21,473, 29,607.78 and 20,144.60

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Solution

The fourth proportional to 21,473, 29,607.78 and 20,144.60 is: 27,776.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,473 : 29,607.78 = 20,144.60 : x
  2. Step 2: Convert to fraction form
    21,473/29,607.78 = 20,144.60/x
  3. Step 3: Cross multiply
    21,473x = 29,607.78 × 20,144.60
  4. Step 4: Simplify right side
    21,473x = 596,436,884.99
  5. Step 5: Solve for x
    x = 596,436,884.99/21,473
  6. Step 6: Final answer
    x = 27,776.13

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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.