Home / 13,890.14-19,164.58-7,919.63

Finding the Fourth Proportional to 13,890.14, 19,164.58 and 7,919.63

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Solution

The fourth proportional to 13,890.14, 19,164.58 and 7,919.63 is: 10,926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.14 : 19,164.58 = 7,919.63 : x
  2. Step 2: Convert to fraction form
    13,890.14/19,164.58 = 7,919.63/x
  3. Step 3: Cross multiply
    13,890.14x = 19,164.58 × 7,919.63
  4. Step 4: Simplify right side
    13,890.14x = 151,776,247.28
  5. Step 5: Solve for x
    x = 151,776,247.28/13,890.14
  6. Step 6: Final answer
    x = 10,926.91

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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.