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Finding the Fourth Proportional to 18,813.71, 28,222.10 and 9,448.91

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Solution

The fourth proportional to 18,813.71, 28,222.10 and 9,448.91 is: 14,174.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.71 : 28,222.10 = 9,448.91 : x
  2. Step 2: Convert to fraction form
    18,813.71/28,222.10 = 9,448.91/x
  3. Step 3: Cross multiply
    18,813.71x = 28,222.10 × 9,448.91
  4. Step 4: Simplify right side
    18,813.71x = 266,668,177.09
  5. Step 5: Solve for x
    x = 266,668,177.09/18,813.71
  6. Step 6: Final answer
    x = 14,174.14

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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.