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Finding the Fourth Proportional to 5,285.08, 7,909.93 and 5,215.15

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Solution

The fourth proportional to 5,285.08, 7,909.93 and 5,215.15 is: 7,805.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.08 : 7,909.93 = 5,215.15 : x
  2. Step 2: Convert to fraction form
    5,285.08/7,909.93 = 5,215.15/x
  3. Step 3: Cross multiply
    5,285.08x = 7,909.93 × 5,215.15
  4. Step 4: Simplify right side
    5,285.08x = 41,251,471.44
  5. Step 5: Solve for x
    x = 41,251,471.44/5,285.08
  6. Step 6: Final answer
    x = 7,805.27

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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.