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Finding the Fourth Proportional to 8,720.25, 12,028.54 and 7,603.86

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Solution

The fourth proportional to 8,720.25, 12,028.54 and 7,603.86 is: 10,488.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.25 : 12,028.54 = 7,603.86 : x
  2. Step 2: Convert to fraction form
    8,720.25/12,028.54 = 7,603.86/x
  3. Step 3: Cross multiply
    8,720.25x = 12,028.54 × 7,603.86
  4. Step 4: Simplify right side
    8,720.25x = 91,463,334.16
  5. Step 5: Solve for x
    x = 91,463,334.16/8,720.25
  6. Step 6: Final answer
    x = 10,488.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.