Home / 21,022.13-31,529.41-5,438.81

Finding the Fourth Proportional to 21,022.13, 31,529.41 and 5,438.81

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Solution

The fourth proportional to 21,022.13, 31,529.41 and 5,438.81 is: 8,157.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.13 : 31,529.41 = 5,438.81 : x
  2. Step 2: Convert to fraction form
    21,022.13/31,529.41 = 5,438.81/x
  3. Step 3: Cross multiply
    21,022.13x = 31,529.41 × 5,438.81
  4. Step 4: Simplify right side
    21,022.13x = 171,482,470.40
  5. Step 5: Solve for x
    x = 171,482,470.40/21,022.13
  6. Step 6: Final answer
    x = 8,157.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.