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Finding the Fourth Proportional to 18,715.65, 28,070.73 and 6,236.08

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Solution

The fourth proportional to 18,715.65, 28,070.73 and 6,236.08 is: 9,353.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.65 : 28,070.73 = 6,236.08 : x
  2. Step 2: Convert to fraction form
    18,715.65/28,070.73 = 6,236.08/x
  3. Step 3: Cross multiply
    18,715.65x = 28,070.73 × 6,236.08
  4. Step 4: Simplify right side
    18,715.65x = 175,051,317.94
  5. Step 5: Solve for x
    x = 175,051,317.94/18,715.65
  6. Step 6: Final answer
    x = 9,353.21

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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.