Home / 18,911.25-28,364.33-7,816.40

Finding the Fourth Proportional to 18,911.25, 28,364.33 and 7,816.40

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Solution

The fourth proportional to 18,911.25, 28,364.33 and 7,816.40 is: 11,723.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.25 : 28,364.33 = 7,816.40 : x
  2. Step 2: Convert to fraction form
    18,911.25/28,364.33 = 7,816.40/x
  3. Step 3: Cross multiply
    18,911.25x = 28,364.33 × 7,816.40
  4. Step 4: Simplify right side
    18,911.25x = 221,706,889.13
  5. Step 5: Solve for x
    x = 221,706,889.13/18,911.25
  6. Step 6: Final answer
    x = 11,723.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.