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Finding the Fourth Proportional to 18,661.66, 25,754.91 and 13,937.74

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Solution

The fourth proportional to 18,661.66, 25,754.91 and 13,937.74 is: 19,235.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.66 : 25,754.91 = 13,937.74 : x
  2. Step 2: Convert to fraction form
    18,661.66/25,754.91 = 13,937.74/x
  3. Step 3: Cross multiply
    18,661.66x = 25,754.91 × 13,937.74
  4. Step 4: Simplify right side
    18,661.66x = 358,965,040.84
  5. Step 5: Solve for x
    x = 358,965,040.84/18,661.66
  6. Step 6: Final answer
    x = 19,235.43

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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.