Home / 31,488.20-43,439.69-21,275.97

Finding the Fourth Proportional to 31,488.20, 43,439.69 and 21,275.97

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Solution

The fourth proportional to 31,488.20, 43,439.69 and 21,275.97 is: 29,351.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,488.20 : 43,439.69 = 21,275.97 : x
  2. Step 2: Convert to fraction form
    31,488.20/43,439.69 = 21,275.97/x
  3. Step 3: Cross multiply
    31,488.20x = 43,439.69 × 21,275.97
  4. Step 4: Simplify right side
    31,488.20x = 924,221,798.06
  5. Step 5: Solve for x
    x = 924,221,798.06/31,488.20
  6. Step 6: Final answer
    x = 29,351.37

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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.