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Finding the Fourth Proportional to 21,818.40, 30,074.40 and 17,094.48

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Solution

The fourth proportional to 21,818.40, 30,074.40 and 17,094.48 is: 23,562.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.40 : 30,074.40 = 17,094.48 : x
  2. Step 2: Convert to fraction form
    21,818.40/30,074.40 = 17,094.48/x
  3. Step 3: Cross multiply
    21,818.40x = 30,074.40 × 17,094.48
  4. Step 4: Simplify right side
    21,818.40x = 514,106,229.31
  5. Step 5: Solve for x
    x = 514,106,229.31/21,818.40
  6. Step 6: Final answer
    x = 23,562.97

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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.