Home / 28,078.13-38,747.82-15,503.69

Finding the Fourth Proportional to 28,078.13, 38,747.82 and 15,503.69

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Solution

The fourth proportional to 28,078.13, 38,747.82 and 15,503.69 is: 21,395.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.13 : 38,747.82 = 15,503.69 : x
  2. Step 2: Convert to fraction form
    28,078.13/38,747.82 = 15,503.69/x
  3. Step 3: Cross multiply
    28,078.13x = 38,747.82 × 15,503.69
  4. Step 4: Simplify right side
    28,078.13x = 600,733,995.72
  5. Step 5: Solve for x
    x = 600,733,995.72/28,078.13
  6. Step 6: Final answer
    x = 21,395.09

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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.