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Finding the Fourth Proportional to 7,670.70, 11,518.20 and 5,216.40

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Solution

The fourth proportional to 7,670.70, 11,518.20 and 5,216.40 is: 7,832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,670.70 : 11,518.20 = 5,216.40 : x
  2. Step 2: Convert to fraction form
    7,670.70/11,518.20 = 5,216.40/x
  3. Step 3: Cross multiply
    7,670.70x = 11,518.20 × 5,216.40
  4. Step 4: Simplify right side
    7,670.70x = 60,083,538.48
  5. Step 5: Solve for x
    x = 60,083,538.48/7,670.70
  6. Step 6: Final answer
    x = 7,832.86

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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.