Home / 8,971.76-13,459.32-3,128.24

Finding the Fourth Proportional to 8,971.76, 13,459.32 and 3,128.24

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Solution

The fourth proportional to 8,971.76, 13,459.32 and 3,128.24 is: 4,692.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.76 : 13,459.32 = 3,128.24 : x
  2. Step 2: Convert to fraction form
    8,971.76/13,459.32 = 3,128.24/x
  3. Step 3: Cross multiply
    8,971.76x = 13,459.32 × 3,128.24
  4. Step 4: Simplify right side
    8,971.76x = 42,103,983.20
  5. Step 5: Solve for x
    x = 42,103,983.20/8,971.76
  6. Step 6: Final answer
    x = 4,692.95

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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.