Home / 28,107.61-42,181.97-20,731.95

Finding the Fourth Proportional to 28,107.61, 42,181.97 and 20,731.95

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Solution

The fourth proportional to 28,107.61, 42,181.97 and 20,731.95 is: 31,113.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.61 : 42,181.97 = 20,731.95 : x
  2. Step 2: Convert to fraction form
    28,107.61/42,181.97 = 20,731.95/x
  3. Step 3: Cross multiply
    28,107.61x = 42,181.97 × 20,731.95
  4. Step 4: Simplify right side
    28,107.61x = 874,514,389.28
  5. Step 5: Solve for x
    x = 874,514,389.28/28,107.61
  6. Step 6: Final answer
    x = 31,113.09

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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.