Home / 19,686.23-27,159.68-12,616.55

Finding the Fourth Proportional to 19,686.23, 27,159.68 and 12,616.55

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Solution

The fourth proportional to 19,686.23, 27,159.68 and 12,616.55 is: 17,406.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,686.23 : 27,159.68 = 12,616.55 : x
  2. Step 2: Convert to fraction form
    19,686.23/27,159.68 = 12,616.55/x
  3. Step 3: Cross multiply
    19,686.23x = 27,159.68 × 12,616.55
  4. Step 4: Simplify right side
    19,686.23x = 342,661,397.62
  5. Step 5: Solve for x
    x = 342,661,397.62/19,686.23
  6. Step 6: Final answer
    x = 17,406.15

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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.