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Finding the Fourth Proportional to 12,641.16, 18,963.72 and 3,875.16

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Solution

The fourth proportional to 12,641.16, 18,963.72 and 3,875.16 is: 5,813.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.16 : 18,963.72 = 3,875.16 : x
  2. Step 2: Convert to fraction form
    12,641.16/18,963.72 = 3,875.16/x
  3. Step 3: Cross multiply
    12,641.16x = 18,963.72 × 3,875.16
  4. Step 4: Simplify right side
    12,641.16x = 73,487,449.20
  5. Step 5: Solve for x
    x = 73,487,449.20/12,641.16
  6. Step 6: Final answer
    x = 5,813.35

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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.