Home / 18,740.87-28,111.81-8,205.45

Finding the Fourth Proportional to 18,740.87, 28,111.81 and 8,205.45

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Solution

The fourth proportional to 18,740.87, 28,111.81 and 8,205.45 is: 12,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,740.87 : 28,111.81 = 8,205.45 : x
  2. Step 2: Convert to fraction form
    18,740.87/28,111.81 = 8,205.45/x
  3. Step 3: Cross multiply
    18,740.87x = 28,111.81 × 8,205.45
  4. Step 4: Simplify right side
    18,740.87x = 230,670,098.95
  5. Step 5: Solve for x
    x = 230,670,098.95/18,740.87
  6. Step 6: Final answer
    x = 12,308.40

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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.