Home / 7,122.58-10,686.18-3,425.09

Finding the Fourth Proportional to 7,122.58, 10,686.18 and 3,425.09

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Solution

The fourth proportional to 7,122.58, 10,686.18 and 3,425.09 is: 5,138.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.58 : 10,686.18 = 3,425.09 : x
  2. Step 2: Convert to fraction form
    7,122.58/10,686.18 = 3,425.09/x
  3. Step 3: Cross multiply
    7,122.58x = 10,686.18 × 3,425.09
  4. Step 4: Simplify right side
    7,122.58x = 36,601,068.40
  5. Step 5: Solve for x
    x = 36,601,068.40/7,122.58
  6. Step 6: Final answer
    x = 5,138.74

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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.