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Finding the Fourth Proportional to 13,168.71, 18,135.90 and 13,127.67

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Solution

The fourth proportional to 13,168.71, 18,135.90 and 13,127.67 is: 18,079.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.71 : 18,135.90 = 13,127.67 : x
  2. Step 2: Convert to fraction form
    13,168.71/18,135.90 = 13,127.67/x
  3. Step 3: Cross multiply
    13,168.71x = 18,135.90 × 13,127.67
  4. Step 4: Simplify right side
    13,168.71x = 238,082,110.35
  5. Step 5: Solve for x
    x = 238,082,110.35/13,168.71
  6. Step 6: Final answer
    x = 18,079.38

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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.