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Finding the Fourth Proportional to 11,998.95, 17,998.24 and 5,420.53

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Solution

The fourth proportional to 11,998.95, 17,998.24 and 5,420.53 is: 8,130.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.95 : 17,998.24 = 5,420.53 : x
  2. Step 2: Convert to fraction form
    11,998.95/17,998.24 = 5,420.53/x
  3. Step 3: Cross multiply
    11,998.95x = 17,998.24 × 5,420.53
  4. Step 4: Simplify right side
    11,998.95x = 97,559,999.87
  5. Step 5: Solve for x
    x = 97,559,999.87/11,998.95
  6. Step 6: Final answer
    x = 8,130.71

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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.