Home / 7,890.28-11,835.72-2,625.76

Finding the Fourth Proportional to 7,890.28, 11,835.72 and 2,625.76

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Solution

The fourth proportional to 7,890.28, 11,835.72 and 2,625.76 is: 3,938.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.28 : 11,835.72 = 2,625.76 : x
  2. Step 2: Convert to fraction form
    7,890.28/11,835.72 = 2,625.76/x
  3. Step 3: Cross multiply
    7,890.28x = 11,835.72 × 2,625.76
  4. Step 4: Simplify right side
    7,890.28x = 31,077,760.15
  5. Step 5: Solve for x
    x = 31,077,760.15/7,890.28
  6. Step 6: Final answer
    x = 3,938.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.