Home / 7,219.20-9,932.80-6,758.40

Finding the Fourth Proportional to 7,219.20, 9,932.80 and 6,758.40

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Solution

The fourth proportional to 7,219.20, 9,932.80 and 6,758.40 is: 9,298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,219.20 : 9,932.80 = 6,758.40 : x
  2. Step 2: Convert to fraction form
    7,219.20/9,932.80 = 6,758.40/x
  3. Step 3: Cross multiply
    7,219.20x = 9,932.80 × 6,758.40
  4. Step 4: Simplify right side
    7,219.20x = 67,129,835.52
  5. Step 5: Solve for x
    x = 67,129,835.52/7,219.20
  6. Step 6: Final answer
    x = 9,298.79

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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.