Home / 13,687.24-18,888.42-7,399.64

Finding the Fourth Proportional to 13,687.24, 18,888.42 and 7,399.64

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Solution

The fourth proportional to 13,687.24, 18,888.42 and 7,399.64 is: 10,211.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.24 : 18,888.42 = 7,399.64 : x
  2. Step 2: Convert to fraction form
    13,687.24/18,888.42 = 7,399.64/x
  3. Step 3: Cross multiply
    13,687.24x = 18,888.42 × 7,399.64
  4. Step 4: Simplify right side
    13,687.24x = 139,767,508.17
  5. Step 5: Solve for x
    x = 139,767,508.17/13,687.24
  6. Step 6: Final answer
    x = 10,211.52

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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.