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Finding the Fourth Proportional to 13,442.76, 18,550.62 and 7,778.43

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Solution

The fourth proportional to 13,442.76, 18,550.62 and 7,778.43 is: 10,734.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,442.76 : 18,550.62 = 7,778.43 : x
  2. Step 2: Convert to fraction form
    13,442.76/18,550.62 = 7,778.43/x
  3. Step 3: Cross multiply
    13,442.76x = 18,550.62 × 7,778.43
  4. Step 4: Simplify right side
    13,442.76x = 144,294,699.13
  5. Step 5: Solve for x
    x = 144,294,699.13/13,442.76
  6. Step 6: Final answer
    x = 10,734.01

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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.