Home / 20,079.49-27,722.70-12,912.63

Finding the Fourth Proportional to 20,079.49, 27,722.70 and 12,912.63

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Solution

The fourth proportional to 20,079.49, 27,722.70 and 12,912.63 is: 17,827.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.49 : 27,722.70 = 12,912.63 : x
  2. Step 2: Convert to fraction form
    20,079.49/27,722.70 = 12,912.63/x
  3. Step 3: Cross multiply
    20,079.49x = 27,722.70 × 12,912.63
  4. Step 4: Simplify right side
    20,079.49x = 357,972,967.70
  5. Step 5: Solve for x
    x = 357,972,967.70/20,079.49
  6. Step 6: Final answer
    x = 17,827.79

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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.