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Finding the Fourth Proportional to 7,881.40, 10,880.22 and 5,376.52

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Solution

The fourth proportional to 7,881.40, 10,880.22 and 5,376.52 is: 7,422.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.40 : 10,880.22 = 5,376.52 : x
  2. Step 2: Convert to fraction form
    7,881.40/10,880.22 = 5,376.52/x
  3. Step 3: Cross multiply
    7,881.40x = 10,880.22 × 5,376.52
  4. Step 4: Simplify right side
    7,881.40x = 58,497,720.43
  5. Step 5: Solve for x
    x = 58,497,720.43/7,881.40
  6. Step 6: Final answer
    x = 7,422.25

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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.