Home / 10,920.02-16,379.85-3,128.66

Finding the Fourth Proportional to 10,920.02, 16,379.85 and 3,128.66

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Solution

The fourth proportional to 10,920.02, 16,379.85 and 3,128.66 is: 4,692.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.02 : 16,379.85 = 3,128.66 : x
  2. Step 2: Convert to fraction form
    10,920.02/16,379.85 = 3,128.66/x
  3. Step 3: Cross multiply
    10,920.02x = 16,379.85 × 3,128.66
  4. Step 4: Simplify right side
    10,920.02x = 51,246,981.50
  5. Step 5: Solve for x
    x = 51,246,981.50/10,920.02
  6. Step 6: Final answer
    x = 4,692.94

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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.