Home / 39,900.74-55,061.89-21,995.73

Finding the Fourth Proportional to 39,900.74, 55,061.89 and 21,995.73

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Solution

The fourth proportional to 39,900.74, 55,061.89 and 21,995.73 is: 30,353.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.74 : 55,061.89 = 21,995.73 : x
  2. Step 2: Convert to fraction form
    39,900.74/55,061.89 = 21,995.73/x
  3. Step 3: Cross multiply
    39,900.74x = 55,061.89 × 21,995.73
  4. Step 4: Simplify right side
    39,900.74x = 1,211,126,410.74
  5. Step 5: Solve for x
    x = 1,211,126,410.74/39,900.74
  6. Step 6: Final answer
    x = 30,353.49

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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.