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Finding the Fourth Proportional to 9,188.12, 12,678.99 and 5,411.90

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Solution

The fourth proportional to 9,188.12, 12,678.99 and 5,411.90 is: 7,468.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,188.12 : 12,678.99 = 5,411.90 : x
  2. Step 2: Convert to fraction form
    9,188.12/12,678.99 = 5,411.90/x
  3. Step 3: Cross multiply
    9,188.12x = 12,678.99 × 5,411.90
  4. Step 4: Simplify right side
    9,188.12x = 68,617,425.98
  5. Step 5: Solve for x
    x = 68,617,425.98/9,188.12
  6. Step 6: Final answer
    x = 7,468.06

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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.