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Finding the Fourth Proportional to 18,792.78, 28,189.17 and 7,697.46

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Solution

The fourth proportional to 18,792.78, 28,189.17 and 7,697.46 is: 11,546.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.78 : 28,189.17 = 7,697.46 : x
  2. Step 2: Convert to fraction form
    18,792.78/28,189.17 = 7,697.46/x
  3. Step 3: Cross multiply
    18,792.78x = 28,189.17 × 7,697.46
  4. Step 4: Simplify right side
    18,792.78x = 216,985,008.51
  5. Step 5: Solve for x
    x = 216,985,008.51/18,792.78
  6. Step 6: Final answer
    x = 11,546.19

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1.5x scale

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.