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Finding the Fourth Proportional to 8,918.66, 12,311.88 and 5,335.22

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Solution

The fourth proportional to 8,918.66, 12,311.88 and 5,335.22 is: 7,365.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.66 : 12,311.88 = 5,335.22 : x
  2. Step 2: Convert to fraction form
    8,918.66/12,311.88 = 5,335.22/x
  3. Step 3: Cross multiply
    8,918.66x = 12,311.88 × 5,335.22
  4. Step 4: Simplify right side
    8,918.66x = 65,686,588.41
  5. Step 5: Solve for x
    x = 65,686,588.41/8,918.66
  6. Step 6: Final answer
    x = 7,365.07

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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.