Home / 28,207.72-38,929.38-15,635.56

Finding the Fourth Proportional to 28,207.72, 38,929.38 and 15,635.56

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Solution

The fourth proportional to 28,207.72, 38,929.38 and 15,635.56 is: 21,578.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,207.72 : 38,929.38 = 15,635.56 : x
  2. Step 2: Convert to fraction form
    28,207.72/38,929.38 = 15,635.56/x
  3. Step 3: Cross multiply
    28,207.72x = 38,929.38 × 15,635.56
  4. Step 4: Simplify right side
    28,207.72x = 608,682,656.75
  5. Step 5: Solve for x
    x = 608,682,656.75/28,207.72
  6. Step 6: Final answer
    x = 21,578.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.