Home / 39,315.74-54,255.40-21,410.72

Finding the Fourth Proportional to 39,315.74, 54,255.40 and 21,410.72

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Solution

The fourth proportional to 39,315.74, 54,255.40 and 21,410.72 is: 29,546.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,315.74 : 54,255.40 = 21,410.72 : x
  2. Step 2: Convert to fraction form
    39,315.74/54,255.40 = 21,410.72/x
  3. Step 3: Cross multiply
    39,315.74x = 54,255.40 × 21,410.72
  4. Step 4: Simplify right side
    39,315.74x = 1,161,647,177.89
  5. Step 5: Solve for x
    x = 1,161,647,177.89/39,315.74
  6. Step 6: Final answer
    x = 29,546.62

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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.