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Finding the Fourth Proportional to 12,643.62, 18,967.49 and 4,746.75

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Solution

The fourth proportional to 12,643.62, 18,967.49 and 4,746.75 is: 7,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.62 : 18,967.49 = 4,746.75 : x
  2. Step 2: Convert to fraction form
    12,643.62/18,967.49 = 4,746.75/x
  3. Step 3: Cross multiply
    12,643.62x = 18,967.49 × 4,746.75
  4. Step 4: Simplify right side
    12,643.62x = 90,033,933.16
  5. Step 5: Solve for x
    x = 90,033,933.16/12,643.62
  6. Step 6: Final answer
    x = 7,120.90

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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.