Home / 31,618.64-43,654.92-19,686.80

Finding the Fourth Proportional to 31,618.64, 43,654.92 and 19,686.80

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Solution

The fourth proportional to 31,618.64, 43,654.92 and 19,686.80 is: 27,180.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.64 : 43,654.92 = 19,686.80 : x
  2. Step 2: Convert to fraction form
    31,618.64/43,654.92 = 19,686.80/x
  3. Step 3: Cross multiply
    31,618.64x = 43,654.92 × 19,686.80
  4. Step 4: Simplify right side
    31,618.64x = 859,425,679.06
  5. Step 5: Solve for x
    x = 859,425,679.06/31,618.64
  6. Step 6: Final answer
    x = 27,180.98

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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.