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Finding the Fourth Proportional to 21,094.68, 29,107.80 and 17,920.80

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Solution

The fourth proportional to 21,094.68, 29,107.80 and 17,920.80 is: 24,728.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,094.68 : 29,107.80 = 17,920.80 : x
  2. Step 2: Convert to fraction form
    21,094.68/29,107.80 = 17,920.80/x
  3. Step 3: Cross multiply
    21,094.68x = 29,107.80 × 17,920.80
  4. Step 4: Simplify right side
    21,094.68x = 521,635,062.24
  5. Step 5: Solve for x
    x = 521,635,062.24/21,094.68
  6. Step 6: Final answer
    x = 24,728.28

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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.