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Finding the Fourth Proportional to 7,250.50, 9,990.87 and 6,858.40

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Solution

The fourth proportional to 7,250.50, 9,990.87 and 6,858.40 is: 9,450.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,250.50 : 9,990.87 = 6,858.40 : x
  2. Step 2: Convert to fraction form
    7,250.50/9,990.87 = 6,858.40/x
  3. Step 3: Cross multiply
    7,250.50x = 9,990.87 × 6,858.40
  4. Step 4: Simplify right side
    7,250.50x = 68,521,382.81
  5. Step 5: Solve for x
    x = 68,521,382.81/7,250.50
  6. Step 6: Final answer
    x = 9,450.57

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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.