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Finding the Fourth Proportional to 13,266.66, 18,308.87 and 7,887.66

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Solution

The fourth proportional to 13,266.66, 18,308.87 and 7,887.66 is: 10,885.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,266.66 : 18,308.87 = 7,887.66 : x
  2. Step 2: Convert to fraction form
    13,266.66/18,308.87 = 7,887.66/x
  3. Step 3: Cross multiply
    13,266.66x = 18,308.87 × 7,887.66
  4. Step 4: Simplify right side
    13,266.66x = 144,414,102.11
  5. Step 5: Solve for x
    x = 144,414,102.11/13,266.66
  6. Step 6: Final answer
    x = 10,885.49

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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.