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Finding the Fourth Proportional to 18,697.67, 28,001.90 and 10,783.53

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Solution

The fourth proportional to 18,697.67, 28,001.90 and 10,783.53 is: 16,149.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.67 : 28,001.90 = 10,783.53 : x
  2. Step 2: Convert to fraction form
    18,697.67/28,001.90 = 10,783.53/x
  3. Step 3: Cross multiply
    18,697.67x = 28,001.90 × 10,783.53
  4. Step 4: Simplify right side
    18,697.67x = 301,959,355.67
  5. Step 5: Solve for x
    x = 301,959,355.67/18,697.67
  6. Step 6: Final answer
    x = 16,149.57

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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.