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Finding the Fourth Proportional to 21,815.16, 30,101.64 and 12,253.22

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Solution

The fourth proportional to 21,815.16, 30,101.64 and 12,253.22 is: 16,907.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.16 : 30,101.64 = 12,253.22 : x
  2. Step 2: Convert to fraction form
    21,815.16/30,101.64 = 12,253.22/x
  3. Step 3: Cross multiply
    21,815.16x = 30,101.64 × 12,253.22
  4. Step 4: Simplify right side
    21,815.16x = 368,841,917.97
  5. Step 5: Solve for x
    x = 368,841,917.97/21,815.16
  6. Step 6: Final answer
    x = 16,907.60

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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.