Home / 31,430.72-43,375.56-18,853.04

Finding the Fourth Proportional to 31,430.72, 43,375.56 and 18,853.04

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Solution

The fourth proportional to 31,430.72, 43,375.56 and 18,853.04 is: 26,017.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,430.72 : 43,375.56 = 18,853.04 : x
  2. Step 2: Convert to fraction form
    31,430.72/43,375.56 = 18,853.04/x
  3. Step 3: Cross multiply
    31,430.72x = 43,375.56 × 18,853.04
  4. Step 4: Simplify right side
    31,430.72x = 817,761,167.70
  5. Step 5: Solve for x
    x = 817,761,167.70/31,430.72
  6. Step 6: Final answer
    x = 26,017.89

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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.