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Finding the Fourth Proportional to 21,897.74, 30,218.87 and 11,826.18

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Solution

The fourth proportional to 21,897.74, 30,218.87 and 11,826.18 is: 16,320.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,897.74 : 30,218.87 = 11,826.18 : x
  2. Step 2: Convert to fraction form
    21,897.74/30,218.87 = 11,826.18/x
  3. Step 3: Cross multiply
    21,897.74x = 30,218.87 × 11,826.18
  4. Step 4: Simplify right side
    21,897.74x = 357,373,796.02
  5. Step 5: Solve for x
    x = 357,373,796.02/21,897.74
  6. Step 6: Final answer
    x = 16,320.12

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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.