Home / 28,209.87-42,282.81-13,201.38

Finding the Fourth Proportional to 28,209.87, 42,282.81 and 13,201.38

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Solution

The fourth proportional to 28,209.87, 42,282.81 and 13,201.38 is: 19,787.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.87 : 42,282.81 = 13,201.38 : x
  2. Step 2: Convert to fraction form
    28,209.87/42,282.81 = 13,201.38/x
  3. Step 3: Cross multiply
    28,209.87x = 42,282.81 × 13,201.38
  4. Step 4: Simplify right side
    28,209.87x = 558,191,442.28
  5. Step 5: Solve for x
    x = 558,191,442.28/28,209.87
  6. Step 6: Final answer
    x = 19,787.10

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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.