Home / 21,751.14-29,988-15,696.30

Finding the Fourth Proportional to 21,751.14, 29,988 and 15,696.30

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Solution

The fourth proportional to 21,751.14, 29,988 and 15,696.30 is: 21,640.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.14 : 29,988 = 15,696.30 : x
  2. Step 2: Convert to fraction form
    21,751.14/29,988 = 15,696.30/x
  3. Step 3: Cross multiply
    21,751.14x = 29,988 × 15,696.30
  4. Step 4: Simplify right side
    21,751.14x = 470,700,644.40
  5. Step 5: Solve for x
    x = 470,700,644.40/21,751.14
  6. Step 6: Final answer
    x = 21,640.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.