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Finding the Fourth Proportional to 8,187.78, 11,300.20 and 5,000.40

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Solution

The fourth proportional to 8,187.78, 11,300.20 and 5,000.40 is: 6,901.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,187.78 : 11,300.20 = 5,000.40 : x
  2. Step 2: Convert to fraction form
    8,187.78/11,300.20 = 5,000.40/x
  3. Step 3: Cross multiply
    8,187.78x = 11,300.20 × 5,000.40
  4. Step 4: Simplify right side
    8,187.78x = 56,505,520.08
  5. Step 5: Solve for x
    x = 56,505,520.08/8,187.78
  6. Step 6: Final answer
    x = 6,901.20

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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.