Home / 21,897.12-30,218.16-12,465.12

Finding the Fourth Proportional to 21,897.12, 30,218.16 and 12,465.12

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Solution

The fourth proportional to 21,897.12, 30,218.16 and 12,465.12 is: 17,201.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,897.12 : 30,218.16 = 12,465.12 : x
  2. Step 2: Convert to fraction form
    21,897.12/30,218.16 = 12,465.12/x
  3. Step 3: Cross multiply
    21,897.12x = 30,218.16 × 12,465.12
  4. Step 4: Simplify right side
    21,897.12x = 376,672,990.58
  5. Step 5: Solve for x
    x = 376,672,990.58/21,897.12
  6. Step 6: Final answer
    x = 17,201.94

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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.