Home / 31,403.20-43,319.10-19,897.06

Finding the Fourth Proportional to 31,403.20, 43,319.10 and 19,897.06

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Solution

The fourth proportional to 31,403.20, 43,319.10 and 19,897.06 is: 27,446.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,403.20 : 43,319.10 = 19,897.06 : x
  2. Step 2: Convert to fraction form
    31,403.20/43,319.10 = 19,897.06/x
  3. Step 3: Cross multiply
    31,403.20x = 43,319.10 × 19,897.06
  4. Step 4: Simplify right side
    31,403.20x = 861,922,731.85
  5. Step 5: Solve for x
    x = 861,922,731.85/31,403.20
  6. Step 6: Final answer
    x = 27,446.97

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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.