Home / 20,571.47-30,857.20-4,989.09

Finding the Fourth Proportional to 20,571.47, 30,857.20 and 4,989.09

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Solution

The fourth proportional to 20,571.47, 30,857.20 and 4,989.09 is: 7,483.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.47 : 30,857.20 = 4,989.09 : x
  2. Step 2: Convert to fraction form
    20,571.47/30,857.20 = 4,989.09/x
  3. Step 3: Cross multiply
    20,571.47x = 30,857.20 × 4,989.09
  4. Step 4: Simplify right side
    20,571.47x = 153,949,479.25
  5. Step 5: Solve for x
    x = 153,949,479.25/20,571.47
  6. Step 6: Final answer
    x = 7,483.64

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Double scale
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Similar ratio
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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.