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Finding the Fourth Proportional to 13,889.87, 19,167.55 and 7,923.47

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Solution

The fourth proportional to 13,889.87, 19,167.55 and 7,923.47 is: 10,934.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.87 : 19,167.55 = 7,923.47 : x
  2. Step 2: Convert to fraction form
    13,889.87/19,167.55 = 7,923.47/x
  3. Step 3: Cross multiply
    13,889.87x = 19,167.55 × 7,923.47
  4. Step 4: Simplify right side
    13,889.87x = 151,873,507.40
  5. Step 5: Solve for x
    x = 151,873,507.40/13,889.87
  6. Step 6: Final answer
    x = 10,934.12

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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.