Home / 18,905.22-28,370.59-7,811.87

Finding the Fourth Proportional to 18,905.22, 28,370.59 and 7,811.87

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Solution

The fourth proportional to 18,905.22, 28,370.59 and 7,811.87 is: 11,723.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.22 : 28,370.59 = 7,811.87 : x
  2. Step 2: Convert to fraction form
    18,905.22/28,370.59 = 7,811.87/x
  3. Step 3: Cross multiply
    18,905.22x = 28,370.59 × 7,811.87
  4. Step 4: Simplify right side
    18,905.22x = 221,627,199.52
  5. Step 5: Solve for x
    x = 221,627,199.52/18,905.22
  6. Step 6: Final answer
    x = 11,723.07

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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.