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Finding the Fourth Proportional to 8,605.54, 11,879.58 and 6,615.40

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Solution

The fourth proportional to 8,605.54, 11,879.58 and 6,615.40 is: 9,132.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.54 : 11,879.58 = 6,615.40 : x
  2. Step 2: Convert to fraction form
    8,605.54/11,879.58 = 6,615.40/x
  3. Step 3: Cross multiply
    8,605.54x = 11,879.58 × 6,615.40
  4. Step 4: Simplify right side
    8,605.54x = 78,588,173.53
  5. Step 5: Solve for x
    x = 78,588,173.53/8,605.54
  6. Step 6: Final answer
    x = 9,132.28

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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.