Home / 18,930.16-28,394.22-5,781.51

Finding the Fourth Proportional to 18,930.16, 28,394.22 and 5,781.51

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Solution

The fourth proportional to 18,930.16, 28,394.22 and 5,781.51 is: 8,671.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.16 : 28,394.22 = 5,781.51 : x
  2. Step 2: Convert to fraction form
    18,930.16/28,394.22 = 5,781.51/x
  3. Step 3: Cross multiply
    18,930.16x = 28,394.22 × 5,781.51
  4. Step 4: Simplify right side
    18,930.16x = 164,161,295.99
  5. Step 5: Solve for x
    x = 164,161,295.99/18,930.16
  6. Step 6: Final answer
    x = 8,671.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.