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Finding the Fourth Proportional to 10,288.80, 15,400.80 and 7,372.80

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Solution

The fourth proportional to 10,288.80, 15,400.80 and 7,372.80 is: 11,035.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,288.80 : 15,400.80 = 7,372.80 : x
  2. Step 2: Convert to fraction form
    10,288.80/15,400.80 = 7,372.80/x
  3. Step 3: Cross multiply
    10,288.80x = 15,400.80 × 7,372.80
  4. Step 4: Simplify right side
    10,288.80x = 113,547,018.24
  5. Step 5: Solve for x
    x = 113,547,018.24/10,288.80
  6. Step 6: Final answer
    x = 11,035.98

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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.