Home / 21,314.40-31,971.71-5,518.33

Finding the Fourth Proportional to 21,314.40, 31,971.71 and 5,518.33

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Solution

The fourth proportional to 21,314.40, 31,971.71 and 5,518.33 is: 8,277.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.40 : 31,971.71 = 5,518.33 : x
  2. Step 2: Convert to fraction form
    21,314.40/31,971.71 = 5,518.33/x
  3. Step 3: Cross multiply
    21,314.40x = 31,971.71 × 5,518.33
  4. Step 4: Simplify right side
    21,314.40x = 176,430,380.31
  5. Step 5: Solve for x
    x = 176,430,380.31/21,314.40
  6. Step 6: Final answer
    x = 8,277.52

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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.