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Finding the Fourth Proportional to 13,687.03, 18,888.15 and 7,399.41

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Solution

The fourth proportional to 13,687.03, 18,888.15 and 7,399.41 is: 10,211.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.03 : 18,888.15 = 7,399.41 : x
  2. Step 2: Convert to fraction form
    13,687.03/18,888.15 = 7,399.41/x
  3. Step 3: Cross multiply
    13,687.03x = 18,888.15 × 7,399.41
  4. Step 4: Simplify right side
    13,687.03x = 139,761,165.99
  5. Step 5: Solve for x
    x = 139,761,165.99/13,687.03
  6. Step 6: Final answer
    x = 10,211.21

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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.