Home / 39,901.42-55,063.28-21,998.09

Finding the Fourth Proportional to 39,901.42, 55,063.28 and 21,998.09

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Solution

The fourth proportional to 39,901.42, 55,063.28 and 21,998.09 is: 30,356.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,901.42 : 55,063.28 = 21,998.09 : x
  2. Step 2: Convert to fraction form
    39,901.42/55,063.28 = 21,998.09/x
  3. Step 3: Cross multiply
    39,901.42x = 55,063.28 × 21,998.09
  4. Step 4: Simplify right side
    39,901.42x = 1,211,286,989.14
  5. Step 5: Solve for x
    x = 1,211,286,989.14/39,901.42
  6. Step 6: Final answer
    x = 30,356.99

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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.