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Finding the Fourth Proportional to 13,393.87, 18,487.23 and 8,355.13

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Solution

The fourth proportional to 13,393.87, 18,487.23 and 8,355.13 is: 11,532.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.87 : 18,487.23 = 8,355.13 : x
  2. Step 2: Convert to fraction form
    13,393.87/18,487.23 = 8,355.13/x
  3. Step 3: Cross multiply
    13,393.87x = 18,487.23 × 8,355.13
  4. Step 4: Simplify right side
    13,393.87x = 154,463,209.99
  5. Step 5: Solve for x
    x = 154,463,209.99/13,393.87
  6. Step 6: Final answer
    x = 11,532.38

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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.