Home / 31,020.71-42,788.36-18,263.14

Finding the Fourth Proportional to 31,020.71, 42,788.36 and 18,263.14

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Solution

The fourth proportional to 31,020.71, 42,788.36 and 18,263.14 is: 25,191.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,020.71 : 42,788.36 = 18,263.14 : x
  2. Step 2: Convert to fraction form
    31,020.71/42,788.36 = 18,263.14/x
  3. Step 3: Cross multiply
    31,020.71x = 42,788.36 × 18,263.14
  4. Step 4: Simplify right side
    31,020.71x = 781,449,747.74
  5. Step 5: Solve for x
    x = 781,449,747.74/31,020.71
  6. Step 6: Final answer
    x = 25,191.23

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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.