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Finding the Fourth Proportional to 19,685.77, 27,167 and 11,187.74

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Solution

The fourth proportional to 19,685.77, 27,167 and 11,187.74 is: 15,439.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,685.77 : 27,167 = 11,187.74 : x
  2. Step 2: Convert to fraction form
    19,685.77/27,167 = 11,187.74/x
  3. Step 3: Cross multiply
    19,685.77x = 27,167 × 11,187.74
  4. Step 4: Simplify right side
    19,685.77x = 303,937,332.58
  5. Step 5: Solve for x
    x = 303,937,332.58/19,685.77
  6. Step 6: Final answer
    x = 15,439.44

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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.