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Finding the Fourth Proportional to 19,619.10, 27,080.55 and 12,545.55

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Solution

The fourth proportional to 19,619.10, 27,080.55 and 12,545.55 is: 17,316.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.10 : 27,080.55 = 12,545.55 : x
  2. Step 2: Convert to fraction form
    19,619.10/27,080.55 = 12,545.55/x
  3. Step 3: Cross multiply
    19,619.10x = 27,080.55 × 12,545.55
  4. Step 4: Simplify right side
    19,619.10x = 339,740,394.05
  5. Step 5: Solve for x
    x = 339,740,394.05/19,619.10
  6. Step 6: Final answer
    x = 17,316.82

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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.