Home / 39,072.65-53,920.19-21,168.11

Finding the Fourth Proportional to 39,072.65, 53,920.19 and 21,168.11

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Solution

The fourth proportional to 39,072.65, 53,920.19 and 21,168.11 is: 29,211.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,072.65 : 53,920.19 = 21,168.11 : x
  2. Step 2: Convert to fraction form
    39,072.65/53,920.19 = 21,168.11/x
  3. Step 3: Cross multiply
    39,072.65x = 53,920.19 × 21,168.11
  4. Step 4: Simplify right side
    39,072.65x = 1,141,388,137.70
  5. Step 5: Solve for x
    x = 1,141,388,137.70/39,072.65
  6. Step 6: Final answer
    x = 29,211.95

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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.