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Finding the Fourth Proportional to 5,215.66, 7,826.52 and 3,139.66

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Solution

The fourth proportional to 5,215.66, 7,826.52 and 3,139.66 is: 4,711.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.66 : 7,826.52 = 3,139.66 : x
  2. Step 2: Convert to fraction form
    5,215.66/7,826.52 = 3,139.66/x
  3. Step 3: Cross multiply
    5,215.66x = 7,826.52 × 3,139.66
  4. Step 4: Simplify right side
    5,215.66x = 24,572,611.78
  5. Step 5: Solve for x
    x = 24,572,611.78/5,215.66
  6. Step 6: Final answer
    x = 4,711.31

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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.