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Finding the Fourth Proportional to 18,276.72, 27,458.88 and 11,715.72

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Solution

The fourth proportional to 18,276.72, 27,458.88 and 11,715.72 is: 17,601.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,276.72 : 27,458.88 = 11,715.72 : x
  2. Step 2: Convert to fraction form
    18,276.72/27,458.88 = 11,715.72/x
  3. Step 3: Cross multiply
    18,276.72x = 27,458.88 × 11,715.72
  4. Step 4: Simplify right side
    18,276.72x = 321,700,549.59
  5. Step 5: Solve for x
    x = 321,700,549.59/18,276.72
  6. Step 6: Final answer
    x = 17,601.66

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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.