Home / 10,212.72-15,320.40-3,640.80

Finding the Fourth Proportional to 10,212.72, 15,320.40 and 3,640.80

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Solution

The fourth proportional to 10,212.72, 15,320.40 and 3,640.80 is: 5,461.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,212.72 : 15,320.40 = 3,640.80 : x
  2. Step 2: Convert to fraction form
    10,212.72/15,320.40 = 3,640.80/x
  3. Step 3: Cross multiply
    10,212.72x = 15,320.40 × 3,640.80
  4. Step 4: Simplify right side
    10,212.72x = 55,778,512.32
  5. Step 5: Solve for x
    x = 55,778,512.32/10,212.72
  6. Step 6: Final answer
    x = 5,461.67

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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.