Home / 21,854.20-30,151.02-12,897.22

Finding the Fourth Proportional to 21,854.20, 30,151.02 and 12,897.22

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Solution

The fourth proportional to 21,854.20, 30,151.02 and 12,897.22 is: 17,793.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854.20 : 30,151.02 = 12,897.22 : x
  2. Step 2: Convert to fraction form
    21,854.20/30,151.02 = 12,897.22/x
  3. Step 3: Cross multiply
    21,854.20x = 30,151.02 × 12,897.22
  4. Step 4: Simplify right side
    21,854.20x = 388,864,338.16
  5. Step 5: Solve for x
    x = 388,864,338.16/21,854.20
  6. Step 6: Final answer
    x = 17,793.57

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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.