Home / 21,219.90-31,833.29-7,180.78

Finding the Fourth Proportional to 21,219.90, 31,833.29 and 7,180.78

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Solution

The fourth proportional to 21,219.90, 31,833.29 and 7,180.78 is: 10,772.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.90 : 31,833.29 = 7,180.78 : x
  2. Step 2: Convert to fraction form
    21,219.90/31,833.29 = 7,180.78/x
  3. Step 3: Cross multiply
    21,219.90x = 31,833.29 × 7,180.78
  4. Step 4: Simplify right side
    21,219.90x = 228,587,852.17
  5. Step 5: Solve for x
    x = 228,587,852.17/21,219.90
  6. Step 6: Final answer
    x = 10,772.33

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1.5x scale

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.