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Finding the Fourth Proportional to 13,123.16, 18,110.30 and 8,090.70

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Solution

The fourth proportional to 13,123.16, 18,110.30 and 8,090.70 is: 11,165.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.16 : 18,110.30 = 8,090.70 : x
  2. Step 2: Convert to fraction form
    13,123.16/18,110.30 = 8,090.70/x
  3. Step 3: Cross multiply
    13,123.16x = 18,110.30 × 8,090.70
  4. Step 4: Simplify right side
    13,123.16x = 146,524,963.76
  5. Step 5: Solve for x
    x = 146,524,963.76/13,123.16
  6. Step 6: Final answer
    x = 11,165.38

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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.