Home / 31,725.81-43,781.63-18,979.53

Finding the Fourth Proportional to 31,725.81, 43,781.63 and 18,979.53

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Solution

The fourth proportional to 31,725.81, 43,781.63 and 18,979.53 is: 26,191.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,725.81 : 43,781.63 = 18,979.53 : x
  2. Step 2: Convert to fraction form
    31,725.81/43,781.63 = 18,979.53/x
  3. Step 3: Cross multiply
    31,725.81x = 43,781.63 × 18,979.53
  4. Step 4: Simplify right side
    31,725.81x = 830,954,665.14
  5. Step 5: Solve for x
    x = 830,954,665.14/31,725.81
  6. Step 6: Final answer
    x = 26,191.76

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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.