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Finding the Fourth Proportional to 19,990.24, 29,980.12 and 5,946.48

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Solution

The fourth proportional to 19,990.24, 29,980.12 and 5,946.48 is: 8,918.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.24 : 29,980.12 = 5,946.48 : x
  2. Step 2: Convert to fraction form
    19,990.24/29,980.12 = 5,946.48/x
  3. Step 3: Cross multiply
    19,990.24x = 29,980.12 × 5,946.48
  4. Step 4: Simplify right side
    19,990.24x = 178,276,183.98
  5. Step 5: Solve for x
    x = 178,276,183.98/19,990.24
  6. Step 6: Final answer
    x = 8,918.16

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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.