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Finding the Fourth Proportional to 7,218.36, 9,961.53 and 4,347.90

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Solution

The fourth proportional to 7,218.36, 9,961.53 and 4,347.90 is: 6,000.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.36 : 9,961.53 = 4,347.90 : x
  2. Step 2: Convert to fraction form
    7,218.36/9,961.53 = 4,347.90/x
  3. Step 3: Cross multiply
    7,218.36x = 9,961.53 × 4,347.90
  4. Step 4: Simplify right side
    7,218.36x = 43,311,736.29
  5. Step 5: Solve for x
    x = 43,311,736.29/7,218.36
  6. Step 6: Final answer
    x = 6,000.22

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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.