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Finding the Fourth Proportional to 9,990.57, 13,792.38 and 7,281.54

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Solution

The fourth proportional to 9,990.57, 13,792.38 and 7,281.54 is: 10,052.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.57 : 13,792.38 = 7,281.54 : x
  2. Step 2: Convert to fraction form
    9,990.57/13,792.38 = 7,281.54/x
  3. Step 3: Cross multiply
    9,990.57x = 13,792.38 × 7,281.54
  4. Step 4: Simplify right side
    9,990.57x = 100,429,766.67
  5. Step 5: Solve for x
    x = 100,429,766.67/9,990.57
  6. Step 6: Final answer
    x = 10,052.46

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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.