Home / 3,111.18-4,293.12-1,915.98

Finding the Fourth Proportional to 3,111.18, 4,293.12 and 1,915.98

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Solution

The fourth proportional to 3,111.18, 4,293.12 and 1,915.98 is: 2,643.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.18 : 4,293.12 = 1,915.98 : x
  2. Step 2: Convert to fraction form
    3,111.18/4,293.12 = 1,915.98/x
  3. Step 3: Cross multiply
    3,111.18x = 4,293.12 × 1,915.98
  4. Step 4: Simplify right side
    3,111.18x = 8,225,532.06
  5. Step 5: Solve for x
    x = 8,225,532.06/3,111.18
  6. Step 6: Final answer
    x = 2,643.86

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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.