Home / 21,326.02-29,422.65-12,940.90

Finding the Fourth Proportional to 21,326.02, 29,422.65 and 12,940.90

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Solution

The fourth proportional to 21,326.02, 29,422.65 and 12,940.90 is: 17,854.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.02 : 29,422.65 = 12,940.90 : x
  2. Step 2: Convert to fraction form
    21,326.02/29,422.65 = 12,940.90/x
  3. Step 3: Cross multiply
    21,326.02x = 29,422.65 × 12,940.90
  4. Step 4: Simplify right side
    21,326.02x = 380,755,571.39
  5. Step 5: Solve for x
    x = 380,755,571.39/21,326.02
  6. Step 6: Final answer
    x = 17,854.04

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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.