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Finding the Fourth Proportional to 19,410.10, 29,115.15 and 12,411.70

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Solution

The fourth proportional to 19,410.10, 29,115.15 and 12,411.70 is: 18,617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,410.10 : 29,115.15 = 12,411.70 : x
  2. Step 2: Convert to fraction form
    19,410.10/29,115.15 = 12,411.70/x
  3. Step 3: Cross multiply
    19,410.10x = 29,115.15 × 12,411.70
  4. Step 4: Simplify right side
    19,410.10x = 361,368,507.26
  5. Step 5: Solve for x
    x = 361,368,507.26/19,410.10
  6. Step 6: Final answer
    x = 18,617.55

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Similar ratio
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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.