Home / 28,920.72-39,910.31-16,173.76

Finding the Fourth Proportional to 28,920.72, 39,910.31 and 16,173.76

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Solution

The fourth proportional to 28,920.72, 39,910.31 and 16,173.76 is: 22,319.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.72 : 39,910.31 = 16,173.76 : x
  2. Step 2: Convert to fraction form
    28,920.72/39,910.31 = 16,173.76/x
  3. Step 3: Cross multiply
    28,920.72x = 39,910.31 × 16,173.76
  4. Step 4: Simplify right side
    28,920.72x = 645,499,775.47
  5. Step 5: Solve for x
    x = 645,499,775.47/28,920.72
  6. Step 6: Final answer
    x = 22,319.63

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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.