Home / 39,696.08-54,780.24-21,790.68

Finding the Fourth Proportional to 39,696.08, 54,780.24 and 21,790.68

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Solution

The fourth proportional to 39,696.08, 54,780.24 and 21,790.68 is: 30,070.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,696.08 : 54,780.24 = 21,790.68 : x
  2. Step 2: Convert to fraction form
    39,696.08/54,780.24 = 21,790.68/x
  3. Step 3: Cross multiply
    39,696.08x = 54,780.24 × 21,790.68
  4. Step 4: Simplify right side
    39,696.08x = 1,193,698,680.16
  5. Step 5: Solve for x
    x = 1,193,698,680.16/39,696.08
  6. Step 6: Final answer
    x = 30,070.95

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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.