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Finding the Fourth Proportional to 20,330.47, 30,495.71 and 5,539.47

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Solution

The fourth proportional to 20,330.47, 30,495.71 and 5,539.47 is: 8,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.47 : 30,495.71 = 5,539.47 : x
  2. Step 2: Convert to fraction form
    20,330.47/30,495.71 = 5,539.47/x
  3. Step 3: Cross multiply
    20,330.47x = 30,495.71 × 5,539.47
  4. Step 4: Simplify right side
    20,330.47x = 168,929,939.00
  5. Step 5: Solve for x
    x = 168,929,939.00/20,330.47
  6. Step 6: Final answer
    x = 8,309.20

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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.