Home / 13,687.13-18,888.24-7,399.50

Finding the Fourth Proportional to 13,687.13, 18,888.24 and 7,399.50

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Solution

The fourth proportional to 13,687.13, 18,888.24 and 7,399.50 is: 10,211.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.13 : 18,888.24 = 7,399.50 : x
  2. Step 2: Convert to fraction form
    13,687.13/18,888.24 = 7,399.50/x
  3. Step 3: Cross multiply
    13,687.13x = 18,888.24 × 7,399.50
  4. Step 4: Simplify right side
    13,687.13x = 139,763,531.88
  5. Step 5: Solve for x
    x = 139,763,531.88/13,687.13
  6. Step 6: Final answer
    x = 10,211.31

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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.