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Finding the Fourth Proportional to 7,842.80, 10,822.20 and 4,486.52

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Solution

The fourth proportional to 7,842.80, 10,822.20 and 4,486.52 is: 6,190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.80 : 10,822.20 = 4,486.52 : x
  2. Step 2: Convert to fraction form
    7,842.80/10,822.20 = 4,486.52/x
  3. Step 3: Cross multiply
    7,842.80x = 10,822.20 × 4,486.52
  4. Step 4: Simplify right side
    7,842.80x = 48,554,016.74
  5. Step 5: Solve for x
    x = 48,554,016.74/7,842.80
  6. Step 6: Final answer
    x = 6,190.90

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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.