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Finding the Fourth Proportional to 20,479.96, 30,719.94 and 5,688.89

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Solution

The fourth proportional to 20,479.96, 30,719.94 and 5,688.89 is: 8,533.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.96 : 30,719.94 = 5,688.89 : x
  2. Step 2: Convert to fraction form
    20,479.96/30,719.94 = 5,688.89/x
  3. Step 3: Cross multiply
    20,479.96x = 30,719.94 × 5,688.89
  4. Step 4: Simplify right side
    20,479.96x = 174,762,359.47
  5. Step 5: Solve for x
    x = 174,762,359.47/20,479.96
  6. Step 6: Final answer
    x = 8,533.34

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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.