Home / 11,820.64-16,311.87-6,515.35

Finding the Fourth Proportional to 11,820.64, 16,311.87 and 6,515.35

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Solution

The fourth proportional to 11,820.64, 16,311.87 and 6,515.35 is: 8,990.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.64 : 16,311.87 = 6,515.35 : x
  2. Step 2: Convert to fraction form
    11,820.64/16,311.87 = 6,515.35/x
  3. Step 3: Cross multiply
    11,820.64x = 16,311.87 × 6,515.35
  4. Step 4: Simplify right side
    11,820.64x = 106,277,542.20
  5. Step 5: Solve for x
    x = 106,277,542.20/11,820.64
  6. Step 6: Final answer
    x = 8,990.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.