Home / 13,195.81-18,205.75-7,816.56

Finding the Fourth Proportional to 13,195.81, 18,205.75 and 7,816.56

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Solution

The fourth proportional to 13,195.81, 18,205.75 and 7,816.56 is: 10,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,195.81 : 18,205.75 = 7,816.56 : x
  2. Step 2: Convert to fraction form
    13,195.81/18,205.75 = 7,816.56/x
  3. Step 3: Cross multiply
    13,195.81x = 18,205.75 × 7,816.56
  4. Step 4: Simplify right side
    13,195.81x = 142,306,338.13
  5. Step 5: Solve for x
    x = 142,306,338.13/13,195.81
  6. Step 6: Final answer
    x = 10,784.21

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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.