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Finding the Fourth Proportional to 9,822.12, 13,555 and 5,630.38

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Solution

The fourth proportional to 9,822.12, 13,555 and 5,630.38 is: 7,770.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,822.12 : 13,555 = 5,630.38 : x
  2. Step 2: Convert to fraction form
    9,822.12/13,555 = 5,630.38/x
  3. Step 3: Cross multiply
    9,822.12x = 13,555 × 5,630.38
  4. Step 4: Simplify right side
    9,822.12x = 76,319,800.90
  5. Step 5: Solve for x
    x = 76,319,800.90/9,822.12
  6. Step 6: Final answer
    x = 7,770.20

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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.