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Finding the Fourth Proportional to 10,419.03, 15,600.60 and 7,138.53

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Solution

The fourth proportional to 10,419.03, 15,600.60 and 7,138.53 is: 10,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,419.03 : 15,600.60 = 7,138.53 : x
  2. Step 2: Convert to fraction form
    10,419.03/15,600.60 = 7,138.53/x
  3. Step 3: Cross multiply
    10,419.03x = 15,600.60 × 7,138.53
  4. Step 4: Simplify right side
    10,419.03x = 111,365,351.12
  5. Step 5: Solve for x
    x = 111,365,351.12/10,419.03
  6. Step 6: Final answer
    x = 10,688.65

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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.