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Finding the Fourth Proportional to 18,709.39, 28,064.69 and 9,822.47

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Solution

The fourth proportional to 18,709.39, 28,064.69 and 9,822.47 is: 14,734.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.39 : 28,064.69 = 9,822.47 : x
  2. Step 2: Convert to fraction form
    18,709.39/28,064.69 = 9,822.47/x
  3. Step 3: Cross multiply
    18,709.39x = 28,064.69 × 9,822.47
  4. Step 4: Simplify right side
    18,709.39x = 275,664,526.47
  5. Step 5: Solve for x
    x = 275,664,526.47/18,709.39
  6. Step 6: Final answer
    x = 14,734.02

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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.