Home / 8,686.03-13,021.32-3,138.16

Finding the Fourth Proportional to 8,686.03, 13,021.32 and 3,138.16

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Solution

The fourth proportional to 8,686.03, 13,021.32 and 3,138.16 is: 4,704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.03 : 13,021.32 = 3,138.16 : x
  2. Step 2: Convert to fraction form
    8,686.03/13,021.32 = 3,138.16/x
  3. Step 3: Cross multiply
    8,686.03x = 13,021.32 × 3,138.16
  4. Step 4: Simplify right side
    8,686.03x = 40,862,985.57
  5. Step 5: Solve for x
    x = 40,862,985.57/8,686.03
  6. Step 6: Final answer
    x = 4,704.45

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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.