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Finding the Fourth Proportional to 21,775.74, 30,062.84 and 16,661.64

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Solution

The fourth proportional to 21,775.74, 30,062.84 and 16,661.64 is: 23,002.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.74 : 30,062.84 = 16,661.64 : x
  2. Step 2: Convert to fraction form
    21,775.74/30,062.84 = 16,661.64/x
  3. Step 3: Cross multiply
    21,775.74x = 30,062.84 × 16,661.64
  4. Step 4: Simplify right side
    21,775.74x = 500,896,134.15
  5. Step 5: Solve for x
    x = 500,896,134.15/21,775.74
  6. Step 6: Final answer
    x = 23,002.49

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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.