Home / 3,915.61-5,403.58-2,147.17

Finding the Fourth Proportional to 3,915.61, 5,403.58 and 2,147.17

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Solution

The fourth proportional to 3,915.61, 5,403.58 and 2,147.17 is: 2,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.61 : 5,403.58 = 2,147.17 : x
  2. Step 2: Convert to fraction form
    3,915.61/5,403.58 = 2,147.17/x
  3. Step 3: Cross multiply
    3,915.61x = 5,403.58 × 2,147.17
  4. Step 4: Simplify right side
    3,915.61x = 11,602,404.87
  5. Step 5: Solve for x
    x = 11,602,404.87/3,915.61
  6. Step 6: Final answer
    x = 2,963.12

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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.