Home / 28,876.78-39,834.18-20,905.18

Finding the Fourth Proportional to 28,876.78, 39,834.18 and 20,905.18

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Solution

The fourth proportional to 28,876.78, 39,834.18 and 20,905.18 is: 28,837.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,876.78 : 39,834.18 = 20,905.18 : x
  2. Step 2: Convert to fraction form
    28,876.78/39,834.18 = 20,905.18/x
  3. Step 3: Cross multiply
    28,876.78x = 39,834.18 × 20,905.18
  4. Step 4: Simplify right side
    28,876.78x = 832,740,703.05
  5. Step 5: Solve for x
    x = 832,740,703.05/28,876.78
  6. Step 6: Final answer
    x = 28,837.73

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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.