Home / 9,378.64-12,942.60-5,186.96

Finding the Fourth Proportional to 9,378.64, 12,942.60 and 5,186.96

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Solution

The fourth proportional to 9,378.64, 12,942.60 and 5,186.96 is: 7,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.64 : 12,942.60 = 5,186.96 : x
  2. Step 2: Convert to fraction form
    9,378.64/12,942.60 = 5,186.96/x
  3. Step 3: Cross multiply
    9,378.64x = 12,942.60 × 5,186.96
  4. Step 4: Simplify right side
    9,378.64x = 67,132,748.50
  5. Step 5: Solve for x
    x = 67,132,748.50/9,378.64
  6. Step 6: Final answer
    x = 7,158.05

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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.