Home / 21,400.32-29,531.88-11,969.76

Finding the Fourth Proportional to 21,400.32, 29,531.88 and 11,969.76

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Solution

The fourth proportional to 21,400.32, 29,531.88 and 11,969.76 is: 16,517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.32 : 29,531.88 = 11,969.76 : x
  2. Step 2: Convert to fraction form
    21,400.32/29,531.88 = 11,969.76/x
  3. Step 3: Cross multiply
    21,400.32x = 29,531.88 × 11,969.76
  4. Step 4: Simplify right side
    21,400.32x = 353,489,515.95
  5. Step 5: Solve for x
    x = 353,489,515.95/21,400.32
  6. Step 6: Final answer
    x = 16,517.95

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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.