Home / 21,727.70-29,986.17-12,770.72

Finding the Fourth Proportional to 21,727.70, 29,986.17 and 12,770.72

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Solution

The fourth proportional to 21,727.70, 29,986.17 and 12,770.72 is: 17,624.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,727.70 : 29,986.17 = 12,770.72 : x
  2. Step 2: Convert to fraction form
    21,727.70/29,986.17 = 12,770.72/x
  3. Step 3: Cross multiply
    21,727.70x = 29,986.17 × 12,770.72
  4. Step 4: Simplify right side
    21,727.70x = 382,944,980.94
  5. Step 5: Solve for x
    x = 382,944,980.94/21,727.70
  6. Step 6: Final answer
    x = 17,624.74

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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.