Home / 39,340.78-54,288.33-21,434.71

Finding the Fourth Proportional to 39,340.78, 54,288.33 and 21,434.71

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Solution

The fourth proportional to 39,340.78, 54,288.33 and 21,434.71 is: 29,578.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,340.78 : 54,288.33 = 21,434.71 : x
  2. Step 2: Convert to fraction form
    39,340.78/54,288.33 = 21,434.71/x
  3. Step 3: Cross multiply
    39,340.78x = 54,288.33 × 21,434.71
  4. Step 4: Simplify right side
    39,340.78x = 1,163,654,338.49
  5. Step 5: Solve for x
    x = 1,163,654,338.49/39,340.78
  6. Step 6: Final answer
    x = 29,578.84

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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.