Home / 20,718.16-31,078.20-5,929.20

Finding the Fourth Proportional to 20,718.16, 31,078.20 and 5,929.20

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Solution

The fourth proportional to 20,718.16, 31,078.20 and 5,929.20 is: 8,894.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.16 : 31,078.20 = 5,929.20 : x
  2. Step 2: Convert to fraction form
    20,718.16/31,078.20 = 5,929.20/x
  3. Step 3: Cross multiply
    20,718.16x = 31,078.20 × 5,929.20
  4. Step 4: Simplify right side
    20,718.16x = 184,268,863.44
  5. Step 5: Solve for x
    x = 184,268,863.44/20,718.16
  6. Step 6: Final answer
    x = 8,894.07

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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.