Home / 21,378.65-29,504.17-12,306.79

Finding the Fourth Proportional to 21,378.65, 29,504.17 and 12,306.79

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Solution

The fourth proportional to 21,378.65, 29,504.17 and 12,306.79 is: 16,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.65 : 29,504.17 = 12,306.79 : x
  2. Step 2: Convert to fraction form
    21,378.65/29,504.17 = 12,306.79/x
  3. Step 3: Cross multiply
    21,378.65x = 29,504.17 × 12,306.79
  4. Step 4: Simplify right side
    21,378.65x = 363,101,441.39
  5. Step 5: Solve for x
    x = 363,101,441.39/21,378.65
  6. Step 6: Final answer
    x = 16,984.30

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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.