Home / 31,149.36-42,975.06-18,399.81

Finding the Fourth Proportional to 31,149.36, 42,975.06 and 18,399.81

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Solution

The fourth proportional to 31,149.36, 42,975.06 and 18,399.81 is: 25,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,149.36 : 42,975.06 = 18,399.81 : x
  2. Step 2: Convert to fraction form
    31,149.36/42,975.06 = 18,399.81/x
  3. Step 3: Cross multiply
    31,149.36x = 42,975.06 × 18,399.81
  4. Step 4: Simplify right side
    31,149.36x = 790,732,789.16
  5. Step 5: Solve for x
    x = 790,732,789.16/31,149.36
  6. Step 6: Final answer
    x = 25,385.20

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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.