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Finding the Fourth Proportional to 6,915.51, 10,368.09 and 3,215.79

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Solution

The fourth proportional to 6,915.51, 10,368.09 and 3,215.79 is: 4,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.51 : 10,368.09 = 3,215.79 : x
  2. Step 2: Convert to fraction form
    6,915.51/10,368.09 = 3,215.79/x
  3. Step 3: Cross multiply
    6,915.51x = 10,368.09 × 3,215.79
  4. Step 4: Simplify right side
    6,915.51x = 33,341,600.14
  5. Step 5: Solve for x
    x = 33,341,600.14/6,915.51
  6. Step 6: Final answer
    x = 4,821.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.