Home / 7,521.36-11,280.22-3,138.86

Finding the Fourth Proportional to 7,521.36, 11,280.22 and 3,138.86

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Solution

The fourth proportional to 7,521.36, 11,280.22 and 3,138.86 is: 4,707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,521.36 : 11,280.22 = 3,138.86 : x
  2. Step 2: Convert to fraction form
    7,521.36/11,280.22 = 3,138.86/x
  3. Step 3: Cross multiply
    7,521.36x = 11,280.22 × 3,138.86
  4. Step 4: Simplify right side
    7,521.36x = 35,407,031.35
  5. Step 5: Solve for x
    x = 35,407,031.35/7,521.36
  6. Step 6: Final answer
    x = 4,707.53

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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.