Home / 11,435.64-15,781.30-6,720

Finding the Fourth Proportional to 11,435.64, 15,781.30 and 6,720

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Solution

The fourth proportional to 11,435.64, 15,781.30 and 6,720 is: 9,273.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,435.64 : 15,781.30 = 6,720 : x
  2. Step 2: Convert to fraction form
    11,435.64/15,781.30 = 6,720/x
  3. Step 3: Cross multiply
    11,435.64x = 15,781.30 × 6,720
  4. Step 4: Simplify right side
    11,435.64x = 106,050,336
  5. Step 5: Solve for x
    x = 106,050,336/11,435.64
  6. Step 6: Final answer
    x = 9,273.67

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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.