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Finding the Fourth Proportional to 10,603.76, 15,908.21 and 7,489.83

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Solution

The fourth proportional to 10,603.76, 15,908.21 and 7,489.83 is: 11,236.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,603.76 : 15,908.21 = 7,489.83 : x
  2. Step 2: Convert to fraction form
    10,603.76/15,908.21 = 7,489.83/x
  3. Step 3: Cross multiply
    10,603.76x = 15,908.21 × 7,489.83
  4. Step 4: Simplify right side
    10,603.76x = 119,149,751.06
  5. Step 5: Solve for x
    x = 119,149,751.06/10,603.76
  6. Step 6: Final answer
    x = 11,236.56

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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.