Home / 8,278.74-12,405.80-6,528.02

Finding the Fourth Proportional to 8,278.74, 12,405.80 and 6,528.02

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Solution

The fourth proportional to 8,278.74, 12,405.80 and 6,528.02 is: 9,782.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.74 : 12,405.80 = 6,528.02 : x
  2. Step 2: Convert to fraction form
    8,278.74/12,405.80 = 6,528.02/x
  3. Step 3: Cross multiply
    8,278.74x = 12,405.80 × 6,528.02
  4. Step 4: Simplify right side
    8,278.74x = 80,985,215.85
  5. Step 5: Solve for x
    x = 80,985,215.85/8,278.74
  6. Step 6: Final answer
    x = 9,782.31

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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.