Home / 3,930.50-5,421.66-2,603.72

Finding the Fourth Proportional to 3,930.50, 5,421.66 and 2,603.72

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Solution

The fourth proportional to 3,930.50, 5,421.66 and 2,603.72 is: 3,591.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.50 : 5,421.66 = 2,603.72 : x
  2. Step 2: Convert to fraction form
    3,930.50/5,421.66 = 2,603.72/x
  3. Step 3: Cross multiply
    3,930.50x = 5,421.66 × 2,603.72
  4. Step 4: Simplify right side
    3,930.50x = 14,116,484.58
  5. Step 5: Solve for x
    x = 14,116,484.58/3,930.50
  6. Step 6: Final answer
    x = 3,591.52

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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.