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Finding the Fourth Proportional to 7,211.71, 9,952.86 and 4,378.43

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Solution

The fourth proportional to 7,211.71, 9,952.86 and 4,378.43 is: 6,042.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.71 : 9,952.86 = 4,378.43 : x
  2. Step 2: Convert to fraction form
    7,211.71/9,952.86 = 4,378.43/x
  3. Step 3: Cross multiply
    7,211.71x = 9,952.86 × 4,378.43
  4. Step 4: Simplify right side
    7,211.71x = 43,577,900.81
  5. Step 5: Solve for x
    x = 43,577,900.81/7,211.71
  6. Step 6: Final answer
    x = 6,042.66

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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.