Home / 21,172.16-31,696.68-18,352.56

Finding the Fourth Proportional to 21,172.16, 31,696.68 and 18,352.56

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Solution

The fourth proportional to 21,172.16, 31,696.68 and 18,352.56 is: 27,475.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.16 : 31,696.68 = 18,352.56 : x
  2. Step 2: Convert to fraction form
    21,172.16/31,696.68 = 18,352.56/x
  3. Step 3: Cross multiply
    21,172.16x = 31,696.68 × 18,352.56
  4. Step 4: Simplify right side
    21,172.16x = 581,715,221.50
  5. Step 5: Solve for x
    x = 581,715,221.50/21,172.16
  6. Step 6: Final answer
    x = 27,475.48

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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.