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Finding the Fourth Proportional to 8,603.89, 12,904.83 and 2,681.21

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Solution

The fourth proportional to 8,603.89, 12,904.83 and 2,681.21 is: 4,021.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.89 : 12,904.83 = 2,681.21 : x
  2. Step 2: Convert to fraction form
    8,603.89/12,904.83 = 2,681.21/x
  3. Step 3: Cross multiply
    8,603.89x = 12,904.83 × 2,681.21
  4. Step 4: Simplify right side
    8,603.89x = 34,600,591.51
  5. Step 5: Solve for x
    x = 34,600,591.51/8,603.89
  6. Step 6: Final answer
    x = 4,021.51

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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.