Home / 39,815.32-54,945.40-21,909.82

Finding the Fourth Proportional to 39,815.32, 54,945.40 and 21,909.82

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Solution

The fourth proportional to 39,815.32, 54,945.40 and 21,909.82 is: 30,235.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,815.32 : 54,945.40 = 21,909.82 : x
  2. Step 2: Convert to fraction form
    39,815.32/54,945.40 = 21,909.82/x
  3. Step 3: Cross multiply
    39,815.32x = 54,945.40 × 21,909.82
  4. Step 4: Simplify right side
    39,815.32x = 1,203,843,823.83
  5. Step 5: Solve for x
    x = 1,203,843,823.83/39,815.32
  6. Step 6: Final answer
    x = 30,235.69

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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.