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Finding the Fourth Proportional to 7,906.90, 10,915.01 and 4,721.30

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Solution

The fourth proportional to 7,906.90, 10,915.01 and 4,721.30 is: 6,517.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.90 : 10,915.01 = 4,721.30 : x
  2. Step 2: Convert to fraction form
    7,906.90/10,915.01 = 4,721.30/x
  3. Step 3: Cross multiply
    7,906.90x = 10,915.01 × 4,721.30
  4. Step 4: Simplify right side
    7,906.90x = 51,533,036.71
  5. Step 5: Solve for x
    x = 51,533,036.71/7,906.90
  6. Step 6: Final answer
    x = 6,517.48

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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.