Home / 3,127.12-4,315.40-1,868.74

Finding the Fourth Proportional to 3,127.12, 4,315.40 and 1,868.74

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Solution

The fourth proportional to 3,127.12, 4,315.40 and 1,868.74 is: 2,578.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.12 : 4,315.40 = 1,868.74 : x
  2. Step 2: Convert to fraction form
    3,127.12/4,315.40 = 1,868.74/x
  3. Step 3: Cross multiply
    3,127.12x = 4,315.40 × 1,868.74
  4. Step 4: Simplify right side
    3,127.12x = 8,064,360.60
  5. Step 5: Solve for x
    x = 8,064,360.60/3,127.12
  6. Step 6: Final answer
    x = 2,578.85

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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.