Home / 21,121.16-31,678.86-5,537.48

Finding the Fourth Proportional to 21,121.16, 31,678.86 and 5,537.48

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Solution

The fourth proportional to 21,121.16, 31,678.86 and 5,537.48 is: 8,305.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.16 : 31,678.86 = 5,537.48 : x
  2. Step 2: Convert to fraction form
    21,121.16/31,678.86 = 5,537.48/x
  3. Step 3: Cross multiply
    21,121.16x = 31,678.86 × 5,537.48
  4. Step 4: Simplify right side
    21,121.16x = 175,421,053.67
  5. Step 5: Solve for x
    x = 175,421,053.67/21,121.16
  6. Step 6: Final answer
    x = 8,305.46

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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.