Home / 7,478.37-10,320.60-4,121.91

Finding the Fourth Proportional to 7,478.37, 10,320.60 and 4,121.91

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Solution

The fourth proportional to 7,478.37, 10,320.60 and 4,121.91 is: 5,688.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.37 : 10,320.60 = 4,121.91 : x
  2. Step 2: Convert to fraction form
    7,478.37/10,320.60 = 4,121.91/x
  3. Step 3: Cross multiply
    7,478.37x = 10,320.60 × 4,121.91
  4. Step 4: Simplify right side
    7,478.37x = 42,540,584.35
  5. Step 5: Solve for x
    x = 42,540,584.35/7,478.37
  6. Step 6: Final answer
    x = 5,688.48

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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.