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Finding the Fourth Proportional to 7,915.05, 10,922.04 and 4,378.59

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Solution

The fourth proportional to 7,915.05, 10,922.04 and 4,378.59 is: 6,042.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.05 : 10,922.04 = 4,378.59 : x
  2. Step 2: Convert to fraction form
    7,915.05/10,922.04 = 4,378.59/x
  3. Step 3: Cross multiply
    7,915.05x = 10,922.04 × 4,378.59
  4. Step 4: Simplify right side
    7,915.05x = 47,823,135.12
  5. Step 5: Solve for x
    x = 47,823,135.12/7,915.05
  6. Step 6: Final answer
    x = 6,042.05

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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.