Home / 39,899.15-55,059.90-21,993.76

Finding the Fourth Proportional to 39,899.15, 55,059.90 and 21,993.76

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Solution

The fourth proportional to 39,899.15, 55,059.90 and 21,993.76 is: 30,350.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,899.15 : 55,059.90 = 21,993.76 : x
  2. Step 2: Convert to fraction form
    39,899.15/55,059.90 = 21,993.76/x
  3. Step 3: Cross multiply
    39,899.15x = 55,059.90 × 21,993.76
  4. Step 4: Simplify right side
    39,899.15x = 1,210,973,950.92
  5. Step 5: Solve for x
    x = 1,210,973,950.92/39,899.15
  6. Step 6: Final answer
    x = 30,350.87

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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.