Home / 8,688.86-13,023.03-3,139.28

Finding the Fourth Proportional to 8,688.86, 13,023.03 and 3,139.28

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Solution

The fourth proportional to 8,688.86, 13,023.03 and 3,139.28 is: 4,705.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.86 : 13,023.03 = 3,139.28 : x
  2. Step 2: Convert to fraction form
    8,688.86/13,023.03 = 3,139.28/x
  3. Step 3: Cross multiply
    8,688.86x = 13,023.03 × 3,139.28
  4. Step 4: Simplify right side
    8,688.86x = 40,882,937.62
  5. Step 5: Solve for x
    x = 40,882,937.62/8,688.86
  6. Step 6: Final answer
    x = 4,705.21

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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.