Home / 31,346.91-43,270.78-21,279.85

Finding the Fourth Proportional to 31,346.91, 43,270.78 and 21,279.85

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Solution

The fourth proportional to 31,346.91, 43,270.78 and 21,279.85 is: 29,374.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,346.91 : 43,270.78 = 21,279.85 : x
  2. Step 2: Convert to fraction form
    31,346.91/43,270.78 = 21,279.85/x
  3. Step 3: Cross multiply
    31,346.91x = 43,270.78 × 21,279.85
  4. Step 4: Simplify right side
    31,346.91x = 920,795,707.78
  5. Step 5: Solve for x
    x = 920,795,707.78/31,346.91
  6. Step 6: Final answer
    x = 29,374.37

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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.