Home / 13,215.96-18,238.41-7,551.54

Finding the Fourth Proportional to 13,215.96, 18,238.41 and 7,551.54

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Solution

The fourth proportional to 13,215.96, 18,238.41 and 7,551.54 is: 10,421.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.96 : 18,238.41 = 7,551.54 : x
  2. Step 2: Convert to fraction form
    13,215.96/18,238.41 = 7,551.54/x
  3. Step 3: Cross multiply
    13,215.96x = 18,238.41 × 7,551.54
  4. Step 4: Simplify right side
    13,215.96x = 137,728,082.65
  5. Step 5: Solve for x
    x = 137,728,082.65/13,215.96
  6. Step 6: Final answer
    x = 10,421.35

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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.