Home / 18,780.92-28,160.85-12,864.49

Finding the Fourth Proportional to 18,780.92, 28,160.85 and 12,864.49

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Solution

The fourth proportional to 18,780.92, 28,160.85 and 12,864.49 is: 19,289.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.92 : 28,160.85 = 12,864.49 : x
  2. Step 2: Convert to fraction form
    18,780.92/28,160.85 = 12,864.49/x
  3. Step 3: Cross multiply
    18,780.92x = 28,160.85 × 12,864.49
  4. Step 4: Simplify right side
    18,780.92x = 362,274,878.69
  5. Step 5: Solve for x
    x = 362,274,878.69/18,780.92
  6. Step 6: Final answer
    x = 19,289.52

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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.