Home / 28,439.92-42,665.28-12,857.50

Finding the Fourth Proportional to 28,439.92, 42,665.28 and 12,857.50

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Solution

The fourth proportional to 28,439.92, 42,665.28 and 12,857.50 is: 19,288.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.92 : 42,665.28 = 12,857.50 : x
  2. Step 2: Convert to fraction form
    28,439.92/42,665.28 = 12,857.50/x
  3. Step 3: Cross multiply
    28,439.92x = 42,665.28 × 12,857.50
  4. Step 4: Simplify right side
    28,439.92x = 548,568,837.60
  5. Step 5: Solve for x
    x = 548,568,837.60/28,439.92
  6. Step 6: Final answer
    x = 19,288.69

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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.