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Finding the Fourth Proportional to 8,583.12, 12,840.48 and 7,188.30

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Solution

The fourth proportional to 8,583.12, 12,840.48 and 7,188.30 is: 10,753.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,583.12 : 12,840.48 = 7,188.30 : x
  2. Step 2: Convert to fraction form
    8,583.12/12,840.48 = 7,188.30/x
  3. Step 3: Cross multiply
    8,583.12x = 12,840.48 × 7,188.30
  4. Step 4: Simplify right side
    8,583.12x = 92,301,222.38
  5. Step 5: Solve for x
    x = 92,301,222.38/8,583.12
  6. Step 6: Final answer
    x = 10,753.81

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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.