Home / 28,109.04-38,789.34-16,780.38

Finding the Fourth Proportional to 28,109.04, 38,789.34 and 16,780.38

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Solution

The fourth proportional to 28,109.04, 38,789.34 and 16,780.38 is: 23,156.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.04 : 38,789.34 = 16,780.38 : x
  2. Step 2: Convert to fraction form
    28,109.04/38,789.34 = 16,780.38/x
  3. Step 3: Cross multiply
    28,109.04x = 38,789.34 × 16,780.38
  4. Step 4: Simplify right side
    28,109.04x = 650,899,865.15
  5. Step 5: Solve for x
    x = 650,899,865.15/28,109.04
  6. Step 6: Final answer
    x = 23,156.25

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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.