Home / 39,309.78-54,247.50-21,404.78

Finding the Fourth Proportional to 39,309.78, 54,247.50 and 21,404.78

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Solution

The fourth proportional to 39,309.78, 54,247.50 and 21,404.78 is: 29,538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,309.78 : 54,247.50 = 21,404.78 : x
  2. Step 2: Convert to fraction form
    39,309.78/54,247.50 = 21,404.78/x
  3. Step 3: Cross multiply
    39,309.78x = 54,247.50 × 21,404.78
  4. Step 4: Simplify right side
    39,309.78x = 1,161,155,803.05
  5. Step 5: Solve for x
    x = 1,161,155,803.05/39,309.78
  6. Step 6: Final answer
    x = 29,538.60

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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.