Home / 13,781.71-19,022.14-7,816.87

Finding the Fourth Proportional to 13,781.71, 19,022.14 and 7,816.87

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Solution

The fourth proportional to 13,781.71, 19,022.14 and 7,816.87 is: 10,789.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.71 : 19,022.14 = 7,816.87 : x
  2. Step 2: Convert to fraction form
    13,781.71/19,022.14 = 7,816.87/x
  3. Step 3: Cross multiply
    13,781.71x = 19,022.14 × 7,816.87
  4. Step 4: Simplify right side
    13,781.71x = 148,693,629.05
  5. Step 5: Solve for x
    x = 148,693,629.05/13,781.71
  6. Step 6: Final answer
    x = 10,789.20

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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.