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Finding the Fourth Proportional to 18,727.68, 28,070.88 and 9,357.12

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Solution

The fourth proportional to 18,727.68, 28,070.88 and 9,357.12 is: 14,025.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,727.68 : 28,070.88 = 9,357.12 : x
  2. Step 2: Convert to fraction form
    18,727.68/28,070.88 = 9,357.12/x
  3. Step 3: Cross multiply
    18,727.68x = 28,070.88 × 9,357.12
  4. Step 4: Simplify right side
    18,727.68x = 262,662,592.67
  5. Step 5: Solve for x
    x = 262,662,592.67/18,727.68
  6. Step 6: Final answer
    x = 14,025.37

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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.