Home / 3,915.40-5,403.12-2,146.99

Finding the Fourth Proportional to 3,915.40, 5,403.12 and 2,146.99

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Solution

The fourth proportional to 3,915.40, 5,403.12 and 2,146.99 is: 2,962.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.40 : 5,403.12 = 2,146.99 : x
  2. Step 2: Convert to fraction form
    3,915.40/5,403.12 = 2,146.99/x
  3. Step 3: Cross multiply
    3,915.40x = 5,403.12 × 2,146.99
  4. Step 4: Simplify right side
    3,915.40x = 11,600,444.61
  5. Step 5: Solve for x
    x = 11,600,444.61/3,915.40
  6. Step 6: Final answer
    x = 2,962.77

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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.