Home / 7,458.12-11,190.42-6,638.40

Finding the Fourth Proportional to 7,458.12, 11,190.42 and 6,638.40

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Solution

The fourth proportional to 7,458.12, 11,190.42 and 6,638.40 is: 9,960.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,458.12 : 11,190.42 = 6,638.40 : x
  2. Step 2: Convert to fraction form
    7,458.12/11,190.42 = 6,638.40/x
  3. Step 3: Cross multiply
    7,458.12x = 11,190.42 × 6,638.40
  4. Step 4: Simplify right side
    7,458.12x = 74,286,484.13
  5. Step 5: Solve for x
    x = 74,286,484.13/7,458.12
  6. Step 6: Final answer
    x = 9,960.48

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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.