Home / 21,177.51-31,767.84-7,137.60

Finding the Fourth Proportional to 21,177.51, 31,767.84 and 7,137.60

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Solution

The fourth proportional to 21,177.51, 31,767.84 and 7,137.60 is: 10,706.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.51 : 31,767.84 = 7,137.60 : x
  2. Step 2: Convert to fraction form
    21,177.51/31,767.84 = 7,137.60/x
  3. Step 3: Cross multiply
    21,177.51x = 31,767.84 × 7,137.60
  4. Step 4: Simplify right side
    21,177.51x = 226,746,134.78
  5. Step 5: Solve for x
    x = 226,746,134.78/21,177.51
  6. Step 6: Final answer
    x = 10,706.93

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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.