Home / 21,278.90-31,918.34-5,696.12

Finding the Fourth Proportional to 21,278.90, 31,918.34 and 5,696.12

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Solution

The fourth proportional to 21,278.90, 31,918.34 and 5,696.12 is: 8,544.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.90 : 31,918.34 = 5,696.12 : x
  2. Step 2: Convert to fraction form
    21,278.90/31,918.34 = 5,696.12/x
  3. Step 3: Cross multiply
    21,278.90x = 31,918.34 × 5,696.12
  4. Step 4: Simplify right side
    21,278.90x = 181,810,694.84
  5. Step 5: Solve for x
    x = 181,810,694.84/21,278.90
  6. Step 6: Final answer
    x = 8,544.18

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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.