Home / 31,830.28-43,911.66-21,209.56

Finding the Fourth Proportional to 31,830.28, 43,911.66 and 21,209.56

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Solution

The fourth proportional to 31,830.28, 43,911.66 and 21,209.56 is: 29,259.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,830.28 : 43,911.66 = 21,209.56 : x
  2. Step 2: Convert to fraction form
    31,830.28/43,911.66 = 21,209.56/x
  3. Step 3: Cross multiply
    31,830.28x = 43,911.66 × 21,209.56
  4. Step 4: Simplify right side
    31,830.28x = 931,346,987.47
  5. Step 5: Solve for x
    x = 931,346,987.47/31,830.28
  6. Step 6: Final answer
    x = 29,259.78

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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.