Home / 20,748.16-31,121.60-6,897.28

Finding the Fourth Proportional to 20,748.16, 31,121.60 and 6,897.28

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Solution

The fourth proportional to 20,748.16, 31,121.60 and 6,897.28 is: 10,345.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.16 : 31,121.60 = 6,897.28 : x
  2. Step 2: Convert to fraction form
    20,748.16/31,121.60 = 6,897.28/x
  3. Step 3: Cross multiply
    20,748.16x = 31,121.60 × 6,897.28
  4. Step 4: Simplify right side
    20,748.16x = 214,654,389.25
  5. Step 5: Solve for x
    x = 214,654,389.25/20,748.16
  6. Step 6: Final answer
    x = 10,345.71

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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.