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Finding the Fourth Proportional to 8,878.99, 13,320.53 and 2,638.87

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Solution

The fourth proportional to 8,878.99, 13,320.53 and 2,638.87 is: 3,958.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.99 : 13,320.53 = 2,638.87 : x
  2. Step 2: Convert to fraction form
    8,878.99/13,320.53 = 2,638.87/x
  3. Step 3: Cross multiply
    8,878.99x = 13,320.53 × 2,638.87
  4. Step 4: Simplify right side
    8,878.99x = 35,151,147.00
  5. Step 5: Solve for x
    x = 35,151,147.00/8,878.99
  6. Step 6: Final answer
    x = 3,958.91

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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.