Home / 21,151.17-31,540.02-20,961.36

Finding the Fourth Proportional to 21,151.17, 31,540.02 and 20,961.36

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Solution

The fourth proportional to 21,151.17, 31,540.02 and 20,961.36 is: 31,256.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.17 : 31,540.02 = 20,961.36 : x
  2. Step 2: Convert to fraction form
    21,151.17/31,540.02 = 20,961.36/x
  3. Step 3: Cross multiply
    21,151.17x = 31,540.02 × 20,961.36
  4. Step 4: Simplify right side
    21,151.17x = 661,121,713.63
  5. Step 5: Solve for x
    x = 661,121,713.63/21,151.17
  6. Step 6: Final answer
    x = 31,256.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.