Home / 31,827.76-43,920.68-18,399.36

Finding the Fourth Proportional to 31,827.76, 43,920.68 and 18,399.36

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Solution

The fourth proportional to 31,827.76, 43,920.68 and 18,399.36 is: 25,390.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,827.76 : 43,920.68 = 18,399.36 : x
  2. Step 2: Convert to fraction form
    31,827.76/43,920.68 = 18,399.36/x
  3. Step 3: Cross multiply
    31,827.76x = 43,920.68 × 18,399.36
  4. Step 4: Simplify right side
    31,827.76x = 808,112,402.76
  5. Step 5: Solve for x
    x = 808,112,402.76/31,827.76
  6. Step 6: Final answer
    x = 25,390.18

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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.