Home / 39,813.66-54,942.91-21,909.76

Finding the Fourth Proportional to 39,813.66, 54,942.91 and 21,909.76

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Solution

The fourth proportional to 39,813.66, 54,942.91 and 21,909.76 is: 30,235.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,813.66 : 54,942.91 = 21,909.76 : x
  2. Step 2: Convert to fraction form
    39,813.66/54,942.91 = 21,909.76/x
  3. Step 3: Cross multiply
    39,813.66x = 54,942.91 × 21,909.76
  4. Step 4: Simplify right side
    39,813.66x = 1,203,785,779.67
  5. Step 5: Solve for x
    x = 1,203,785,779.67/39,813.66
  6. Step 6: Final answer
    x = 30,235.50

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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.