Home / 39,043.68-53,880.20-21,138.70

Finding the Fourth Proportional to 39,043.68, 53,880.20 and 21,138.70

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Solution

The fourth proportional to 39,043.68, 53,880.20 and 21,138.70 is: 29,171.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.68 : 53,880.20 = 21,138.70 : x
  2. Step 2: Convert to fraction form
    39,043.68/53,880.20 = 21,138.70/x
  3. Step 3: Cross multiply
    39,043.68x = 53,880.20 × 21,138.70
  4. Step 4: Simplify right side
    39,043.68x = 1,138,957,383.74
  5. Step 5: Solve for x
    x = 1,138,957,383.74/39,043.68
  6. Step 6: Final answer
    x = 29,171.36

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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.