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Finding the Fourth Proportional to 18,722.16, 28,063.80 and 7,624.08

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Solution

The fourth proportional to 18,722.16, 28,063.80 and 7,624.08 is: 11,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.16 : 28,063.80 = 7,624.08 : x
  2. Step 2: Convert to fraction form
    18,722.16/28,063.80 = 7,624.08/x
  3. Step 3: Cross multiply
    18,722.16x = 28,063.80 × 7,624.08
  4. Step 4: Simplify right side
    18,722.16x = 213,960,656.30
  5. Step 5: Solve for x
    x = 213,960,656.30/18,722.16
  6. Step 6: Final answer
    x = 11,428.20

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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.