Home / 7,429.20-11,157.69-6,540.05

Finding the Fourth Proportional to 7,429.20, 11,157.69 and 6,540.05

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Solution

The fourth proportional to 7,429.20, 11,157.69 and 6,540.05 is: 9,822.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,429.20 : 11,157.69 = 6,540.05 : x
  2. Step 2: Convert to fraction form
    7,429.20/11,157.69 = 6,540.05/x
  3. Step 3: Cross multiply
    7,429.20x = 11,157.69 × 6,540.05
  4. Step 4: Simplify right side
    7,429.20x = 72,971,878.38
  5. Step 5: Solve for x
    x = 72,971,878.38/7,429.20
  6. Step 6: Final answer
    x = 9,822.30

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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.