Home / 13,120.68-19,663.40-7,188.65

Finding the Fourth Proportional to 13,120.68, 19,663.40 and 7,188.65

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Solution

The fourth proportional to 13,120.68, 19,663.40 and 7,188.65 is: 10,773.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.68 : 19,663.40 = 7,188.65 : x
  2. Step 2: Convert to fraction form
    13,120.68/19,663.40 = 7,188.65/x
  3. Step 3: Cross multiply
    13,120.68x = 19,663.40 × 7,188.65
  4. Step 4: Simplify right side
    13,120.68x = 141,353,202.09
  5. Step 5: Solve for x
    x = 141,353,202.09/13,120.68
  6. Step 6: Final answer
    x = 10,773.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.