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Finding the Fourth Proportional to 8,610.99, 11,878.65 and 7,110.15

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Solution

The fourth proportional to 8,610.99, 11,878.65 and 7,110.15 is: 9,808.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.99 : 11,878.65 = 7,110.15 : x
  2. Step 2: Convert to fraction form
    8,610.99/11,878.65 = 7,110.15/x
  3. Step 3: Cross multiply
    8,610.99x = 11,878.65 × 7,110.15
  4. Step 4: Simplify right side
    8,610.99x = 84,458,983.30
  5. Step 5: Solve for x
    x = 84,458,983.30/8,610.99
  6. Step 6: Final answer
    x = 9,808.28

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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.