Home / 20,911.90-31,368.03-5,329.51

Finding the Fourth Proportional to 20,911.90, 31,368.03 and 5,329.51

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Solution

The fourth proportional to 20,911.90, 31,368.03 and 5,329.51 is: 7,994.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.90 : 31,368.03 = 5,329.51 : x
  2. Step 2: Convert to fraction form
    20,911.90/31,368.03 = 5,329.51/x
  3. Step 3: Cross multiply
    20,911.90x = 31,368.03 × 5,329.51
  4. Step 4: Simplify right side
    20,911.90x = 167,176,229.57
  5. Step 5: Solve for x
    x = 167,176,229.57/20,911.90
  6. Step 6: Final answer
    x = 7,994.31

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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.