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Finding the Fourth Proportional to 6,617.10, 9,917.55 and 2,915.40

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Solution

The fourth proportional to 6,617.10, 9,917.55 and 2,915.40 is: 4,369.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,617.10 : 9,917.55 = 2,915.40 : x
  2. Step 2: Convert to fraction form
    6,617.10/9,917.55 = 2,915.40/x
  3. Step 3: Cross multiply
    6,617.10x = 9,917.55 × 2,915.40
  4. Step 4: Simplify right side
    6,617.10x = 28,913,625.27
  5. Step 5: Solve for x
    x = 28,913,625.27/6,617.10
  6. Step 6: Final answer
    x = 4,369.53

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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.