Home / 21,176.65-31,767.91-7,140.70

Finding the Fourth Proportional to 21,176.65, 31,767.91 and 7,140.70

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Solution

The fourth proportional to 21,176.65, 31,767.91 and 7,140.70 is: 10,712.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.65 : 31,767.91 = 7,140.70 : x
  2. Step 2: Convert to fraction form
    21,176.65/31,767.91 = 7,140.70/x
  3. Step 3: Cross multiply
    21,176.65x = 31,767.91 × 7,140.70
  4. Step 4: Simplify right side
    21,176.65x = 226,844,920.39
  5. Step 5: Solve for x
    x = 226,844,920.39/21,176.65
  6. Step 6: Final answer
    x = 10,712.03

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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.