Home / 21,690.12-29,935.76-13,194.88

Finding the Fourth Proportional to 21,690.12, 29,935.76 and 13,194.88

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Solution

The fourth proportional to 21,690.12, 29,935.76 and 13,194.88 is: 18,211.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.12 : 29,935.76 = 13,194.88 : x
  2. Step 2: Convert to fraction form
    21,690.12/29,935.76 = 13,194.88/x
  3. Step 3: Cross multiply
    21,690.12x = 29,935.76 × 13,194.88
  4. Step 4: Simplify right side
    21,690.12x = 394,998,760.91
  5. Step 5: Solve for x
    x = 394,998,760.91/21,690.12
  6. Step 6: Final answer
    x = 18,211.00

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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.