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Finding the Fourth Proportional to 13,858.78, 20,793.33 and 8,316.10

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Solution

The fourth proportional to 13,858.78, 20,793.33 and 8,316.10 is: 12,477.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,858.78 : 20,793.33 = 8,316.10 : x
  2. Step 2: Convert to fraction form
    13,858.78/20,793.33 = 8,316.10/x
  3. Step 3: Cross multiply
    13,858.78x = 20,793.33 × 8,316.10
  4. Step 4: Simplify right side
    13,858.78x = 172,919,359.63
  5. Step 5: Solve for x
    x = 172,919,359.63/13,858.78
  6. Step 6: Final answer
    x = 12,477.24

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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.