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Finding the Fourth Proportional to 13,381.16, 18,409.41 and 13,012.11

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Solution

The fourth proportional to 13,381.16, 18,409.41 and 13,012.11 is: 17,901.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.16 : 18,409.41 = 13,012.11 : x
  2. Step 2: Convert to fraction form
    13,381.16/18,409.41 = 13,012.11/x
  3. Step 3: Cross multiply
    13,381.16x = 18,409.41 × 13,012.11
  4. Step 4: Simplify right side
    13,381.16x = 239,545,267.96
  5. Step 5: Solve for x
    x = 239,545,267.96/13,381.16
  6. Step 6: Final answer
    x = 17,901.68

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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.