Home / 3,878.61-5,347.48-2,817.91

Finding the Fourth Proportional to 3,878.61, 5,347.48 and 2,817.91

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Solution

The fourth proportional to 3,878.61, 5,347.48 and 2,817.91 is: 3,885.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.61 : 5,347.48 = 2,817.91 : x
  2. Step 2: Convert to fraction form
    3,878.61/5,347.48 = 2,817.91/x
  3. Step 3: Cross multiply
    3,878.61x = 5,347.48 × 2,817.91
  4. Step 4: Simplify right side
    3,878.61x = 15,068,717.37
  5. Step 5: Solve for x
    x = 15,068,717.37/3,878.61
  6. Step 6: Final answer
    x = 3,885.08

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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.