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Finding the Fourth Proportional to 11,810.60, 17,715.90 and 6,615.80

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Solution

The fourth proportional to 11,810.60, 17,715.90 and 6,615.80 is: 9,923.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.60 : 17,715.90 = 6,615.80 : x
  2. Step 2: Convert to fraction form
    11,810.60/17,715.90 = 6,615.80/x
  3. Step 3: Cross multiply
    11,810.60x = 17,715.90 × 6,615.80
  4. Step 4: Simplify right side
    11,810.60x = 117,204,851.22
  5. Step 5: Solve for x
    x = 117,204,851.22/11,810.60
  6. Step 6: Final answer
    x = 9,923.70

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1.5x scale

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.