Home / 9,378.32-12,942.42-5,129.67

Finding the Fourth Proportional to 9,378.32, 12,942.42 and 5,129.67

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Solution

The fourth proportional to 9,378.32, 12,942.42 and 5,129.67 is: 7,079.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.32 : 12,942.42 = 5,129.67 : x
  2. Step 2: Convert to fraction form
    9,378.32/12,942.42 = 5,129.67/x
  3. Step 3: Cross multiply
    9,378.32x = 12,942.42 × 5,129.67
  4. Step 4: Simplify right side
    9,378.32x = 66,390,343.60
  5. Step 5: Solve for x
    x = 66,390,343.60/9,378.32
  6. Step 6: Final answer
    x = 7,079.13

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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.