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Finding the Fourth Proportional to 11,810.80, 17,742.60 and 9,866.80

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Solution

The fourth proportional to 11,810.80, 17,742.60 and 9,866.80 is: 14,822.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.80 : 17,742.60 = 9,866.80 : x
  2. Step 2: Convert to fraction form
    11,810.80/17,742.60 = 9,866.80/x
  3. Step 3: Cross multiply
    11,810.80x = 17,742.60 × 9,866.80
  4. Step 4: Simplify right side
    11,810.80x = 175,062,685.68
  5. Step 5: Solve for x
    x = 175,062,685.68/11,810.80
  6. Step 6: Final answer
    x = 14,822.25

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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.