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Finding the Fourth Proportional to 20,478.52, 30,699.48 and 7,995.62

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Solution

The fourth proportional to 20,478.52, 30,699.48 and 7,995.62 is: 11,986.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.52 : 30,699.48 = 7,995.62 : x
  2. Step 2: Convert to fraction form
    20,478.52/30,699.48 = 7,995.62/x
  3. Step 3: Cross multiply
    20,478.52x = 30,699.48 × 7,995.62
  4. Step 4: Simplify right side
    20,478.52x = 245,461,483.01
  5. Step 5: Solve for x
    x = 245,461,483.01/20,478.52
  6. Step 6: Final answer
    x = 11,986.29

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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.