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Finding the Fourth Proportional to 6,899.49, 9,521.36 and 3,915.33

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Solution

The fourth proportional to 6,899.49, 9,521.36 and 3,915.33 is: 5,403.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,899.49 : 9,521.36 = 3,915.33 : x
  2. Step 2: Convert to fraction form
    6,899.49/9,521.36 = 3,915.33/x
  3. Step 3: Cross multiply
    6,899.49x = 9,521.36 × 3,915.33
  4. Step 4: Simplify right side
    6,899.49x = 37,279,246.87
  5. Step 5: Solve for x
    x = 37,279,246.87/6,899.49
  6. Step 6: Final answer
    x = 5,403.19

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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.