Home / 31,279.59-43,149.69-21,204.63

Finding the Fourth Proportional to 31,279.59, 43,149.69 and 21,204.63

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Solution

The fourth proportional to 31,279.59, 43,149.69 and 21,204.63 is: 29,251.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,279.59 : 43,149.69 = 21,204.63 : x
  2. Step 2: Convert to fraction form
    31,279.59/43,149.69 = 21,204.63/x
  3. Step 3: Cross multiply
    31,279.59x = 43,149.69 × 21,204.63
  4. Step 4: Simplify right side
    31,279.59x = 914,973,211.06
  5. Step 5: Solve for x
    x = 914,973,211.06/31,279.59
  6. Step 6: Final answer
    x = 29,251.45

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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.