Home / 13,890.16-19,164.63-7,919.65

Finding the Fourth Proportional to 13,890.16, 19,164.63 and 7,919.65

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Solution

The fourth proportional to 13,890.16, 19,164.63 and 7,919.65 is: 10,926.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.16 : 19,164.63 = 7,919.65 : x
  2. Step 2: Convert to fraction form
    13,890.16/19,164.63 = 7,919.65/x
  3. Step 3: Cross multiply
    13,890.16x = 19,164.63 × 7,919.65
  4. Step 4: Simplify right side
    13,890.16x = 151,777,161.98
  5. Step 5: Solve for x
    x = 151,777,161.98/13,890.16
  6. Step 6: Final answer
    x = 10,926.96

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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.