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Finding the Fourth Proportional to 8,151.48, 11,239.08 and 6,890.28

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Solution

The fourth proportional to 8,151.48, 11,239.08 and 6,890.28 is: 9,500.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,151.48 : 11,239.08 = 6,890.28 : x
  2. Step 2: Convert to fraction form
    8,151.48/11,239.08 = 6,890.28/x
  3. Step 3: Cross multiply
    8,151.48x = 11,239.08 × 6,890.28
  4. Step 4: Simplify right side
    8,151.48x = 77,440,408.14
  5. Step 5: Solve for x
    x = 77,440,408.14/8,151.48
  6. Step 6: Final answer
    x = 9,500.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.