Home / 39,161.78-54,043.52-21,256.78

Finding the Fourth Proportional to 39,161.78, 54,043.52 and 21,256.78

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Solution

The fourth proportional to 39,161.78, 54,043.52 and 21,256.78 is: 29,334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,161.78 : 54,043.52 = 21,256.78 : x
  2. Step 2: Convert to fraction form
    39,161.78/54,043.52 = 21,256.78/x
  3. Step 3: Cross multiply
    39,161.78x = 54,043.52 × 21,256.78
  4. Step 4: Simplify right side
    39,161.78x = 1,148,791,133.10
  5. Step 5: Solve for x
    x = 1,148,791,133.10/39,161.78
  6. Step 6: Final answer
    x = 29,334.50

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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.