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Finding the Fourth Proportional to 8,866.72, 12,236.70 and 5,090.50

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Solution

The fourth proportional to 8,866.72, 12,236.70 and 5,090.50 is: 7,025.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,866.72 : 12,236.70 = 5,090.50 : x
  2. Step 2: Convert to fraction form
    8,866.72/12,236.70 = 5,090.50/x
  3. Step 3: Cross multiply
    8,866.72x = 12,236.70 × 5,090.50
  4. Step 4: Simplify right side
    8,866.72x = 62,290,921.35
  5. Step 5: Solve for x
    x = 62,290,921.35/8,866.72
  6. Step 6: Final answer
    x = 7,025.25

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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.