Home / 11,242.70-15,515.45-6,464.20

Finding the Fourth Proportional to 11,242.70, 15,515.45 and 6,464.20

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Solution

The fourth proportional to 11,242.70, 15,515.45 and 6,464.20 is: 8,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,242.70 : 15,515.45 = 6,464.20 : x
  2. Step 2: Convert to fraction form
    11,242.70/15,515.45 = 6,464.20/x
  3. Step 3: Cross multiply
    11,242.70x = 15,515.45 × 6,464.20
  4. Step 4: Simplify right side
    11,242.70x = 100,294,971.89
  5. Step 5: Solve for x
    x = 100,294,971.89/11,242.70
  6. Step 6: Final answer
    x = 8,920.90

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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.