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Finding the Fourth Proportional to 7,451.76, 11,121.86 and 7,328.74

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Solution

The fourth proportional to 7,451.76, 11,121.86 and 7,328.74 is: 10,938.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,451.76 : 11,121.86 = 7,328.74 : x
  2. Step 2: Convert to fraction form
    7,451.76/11,121.86 = 7,328.74/x
  3. Step 3: Cross multiply
    7,451.76x = 11,121.86 × 7,328.74
  4. Step 4: Simplify right side
    7,451.76x = 81,509,220.26
  5. Step 5: Solve for x
    x = 81,509,220.26/7,451.76
  6. Step 6: Final answer
    x = 10,938.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.