Home / 28,143.05-42,167.72-19,805.58

Finding the Fourth Proportional to 28,143.05, 42,167.72 and 19,805.58

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Solution

The fourth proportional to 28,143.05, 42,167.72 and 19,805.58 is: 29,675.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.05 : 42,167.72 = 19,805.58 : x
  2. Step 2: Convert to fraction form
    28,143.05/42,167.72 = 19,805.58/x
  3. Step 3: Cross multiply
    28,143.05x = 42,167.72 × 19,805.58
  4. Step 4: Simplify right side
    28,143.05x = 835,156,201.39
  5. Step 5: Solve for x
    x = 835,156,201.39/28,143.05
  6. Step 6: Final answer
    x = 29,675.40

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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.