Home / 11,820.15-16,311.59-6,442.64

Finding the Fourth Proportional to 11,820.15, 16,311.59 and 6,442.64

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Solution

The fourth proportional to 11,820.15, 16,311.59 and 6,442.64 is: 8,890.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.15 : 16,311.59 = 6,442.64 : x
  2. Step 2: Convert to fraction form
    11,820.15/16,311.59 = 6,442.64/x
  3. Step 3: Cross multiply
    11,820.15x = 16,311.59 × 6,442.64
  4. Step 4: Simplify right side
    11,820.15x = 105,089,702.20
  5. Step 5: Solve for x
    x = 105,089,702.20/11,820.15
  6. Step 6: Final answer
    x = 8,890.72

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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.