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Finding the Fourth Proportional to 8,913.87, 13,370.00 and 3,987.45

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Solution

The fourth proportional to 8,913.87, 13,370.00 and 3,987.45 is: 5,980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.87 : 13,370.00 = 3,987.45 : x
  2. Step 2: Convert to fraction form
    8,913.87/13,370.00 = 3,987.45/x
  3. Step 3: Cross multiply
    8,913.87x = 13,370.00 × 3,987.45
  4. Step 4: Simplify right side
    8,913.87x = 53,312,186.56
  5. Step 5: Solve for x
    x = 53,312,186.56/8,913.87
  6. Step 6: Final answer
    x = 5,980.81

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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.