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Finding the Fourth Proportional to 8,605.60, 11,866.26 and 5,615.80

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Solution

The fourth proportional to 8,605.60, 11,866.26 and 5,615.80 is: 7,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.60 : 11,866.26 = 5,615.80 : x
  2. Step 2: Convert to fraction form
    8,605.60/11,866.26 = 5,615.80/x
  3. Step 3: Cross multiply
    8,605.60x = 11,866.26 × 5,615.80
  4. Step 4: Simplify right side
    8,605.60x = 66,638,542.91
  5. Step 5: Solve for x
    x = 66,638,542.91/8,605.60
  6. Step 6: Final answer
    x = 7,743.63

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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.