Home / 20,919.86-31,385.93-8,433.47

Finding the Fourth Proportional to 20,919.86, 31,385.93 and 8,433.47

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Solution

The fourth proportional to 20,919.86, 31,385.93 and 8,433.47 is: 12,652.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.86 : 31,385.93 = 8,433.47 : x
  2. Step 2: Convert to fraction form
    20,919.86/31,385.93 = 8,433.47/x
  3. Step 3: Cross multiply
    20,919.86x = 31,385.93 × 8,433.47
  4. Step 4: Simplify right side
    20,919.86x = 264,692,299.08
  5. Step 5: Solve for x
    x = 264,692,299.08/20,919.86
  6. Step 6: Final answer
    x = 12,652.68

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1.5x scale

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.