Home / 11,108.60-16,670.10-6,428.60

Finding the Fourth Proportional to 11,108.60, 16,670.10 and 6,428.60

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Solution

The fourth proportional to 11,108.60, 16,670.10 and 6,428.60 is: 9,647.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,108.60 : 16,670.10 = 6,428.60 : x
  2. Step 2: Convert to fraction form
    11,108.60/16,670.10 = 6,428.60/x
  3. Step 3: Cross multiply
    11,108.60x = 16,670.10 × 6,428.60
  4. Step 4: Simplify right side
    11,108.60x = 107,165,404.86
  5. Step 5: Solve for x
    x = 107,165,404.86/11,108.60
  6. Step 6: Final answer
    x = 9,647.07

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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.