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Finding the Fourth Proportional to 18,322.71, 27,423.90 and 13,915.89

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Solution

The fourth proportional to 18,322.71, 27,423.90 and 13,915.89 is: 20,828.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,322.71 : 27,423.90 = 13,915.89 : x
  2. Step 2: Convert to fraction form
    18,322.71/27,423.90 = 13,915.89/x
  3. Step 3: Cross multiply
    18,322.71x = 27,423.90 × 13,915.89
  4. Step 4: Simplify right side
    18,322.71x = 381,627,975.77
  5. Step 5: Solve for x
    x = 381,627,975.77/18,322.71
  6. Step 6: Final answer
    x = 20,828.14

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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.