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Finding the Fourth Proportional to 7,229.61, 9,978.35 and 4,247.01

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Solution

The fourth proportional to 7,229.61, 9,978.35 and 4,247.01 is: 5,861.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,229.61 : 9,978.35 = 4,247.01 : x
  2. Step 2: Convert to fraction form
    7,229.61/9,978.35 = 4,247.01/x
  3. Step 3: Cross multiply
    7,229.61x = 9,978.35 × 4,247.01
  4. Step 4: Simplify right side
    7,229.61x = 42,378,131.00
  5. Step 5: Solve for x
    x = 42,378,131.00/7,229.61
  6. Step 6: Final answer
    x = 5,861.75

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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.