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Finding the Fourth Proportional to 7,188.67, 9,920.58 and 4,355.44

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Solution

The fourth proportional to 7,188.67, 9,920.58 and 4,355.44 is: 6,010.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.67 : 9,920.58 = 4,355.44 : x
  2. Step 2: Convert to fraction form
    7,188.67/9,920.58 = 4,355.44/x
  3. Step 3: Cross multiply
    7,188.67x = 9,920.58 × 4,355.44
  4. Step 4: Simplify right side
    7,188.67x = 43,208,490.96
  5. Step 5: Solve for x
    x = 43,208,490.96/7,188.67
  6. Step 6: Final answer
    x = 6,010.64

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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.