Home / 40,145.05-55,400.14-21,995.79

Finding the Fourth Proportional to 40,145.05, 55,400.14 and 21,995.79

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Solution

The fourth proportional to 40,145.05, 55,400.14 and 21,995.79 is: 30,354.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,145.05 : 55,400.14 = 21,995.79 : x
  2. Step 2: Convert to fraction form
    40,145.05/55,400.14 = 21,995.79/x
  3. Step 3: Cross multiply
    40,145.05x = 55,400.14 × 21,995.79
  4. Step 4: Simplify right side
    40,145.05x = 1,218,569,845.41
  5. Step 5: Solve for x
    x = 1,218,569,845.41/40,145.05
  6. Step 6: Final answer
    x = 30,354.17

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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.