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Finding the Fourth Proportional to 18,239.71, 27,359.57 and 14,085.79

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Solution

The fourth proportional to 18,239.71, 27,359.57 and 14,085.79 is: 21,128.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,239.71 : 27,359.57 = 14,085.79 : x
  2. Step 2: Convert to fraction form
    18,239.71/27,359.57 = 14,085.79/x
  3. Step 3: Cross multiply
    18,239.71x = 27,359.57 × 14,085.79
  4. Step 4: Simplify right side
    18,239.71x = 385,381,157.51
  5. Step 5: Solve for x
    x = 385,381,157.51/18,239.71
  6. Step 6: Final answer
    x = 21,128.69

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Similar ratio
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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.