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Finding the Fourth Proportional to 20,442.51, 30,665.76 and 7,963.56

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Solution

The fourth proportional to 20,442.51, 30,665.76 and 7,963.56 is: 11,946.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.51 : 30,665.76 = 7,963.56 : x
  2. Step 2: Convert to fraction form
    20,442.51/30,665.76 = 7,963.56/x
  3. Step 3: Cross multiply
    20,442.51x = 30,665.76 × 7,963.56
  4. Step 4: Simplify right side
    20,442.51x = 244,208,619.71
  5. Step 5: Solve for x
    x = 244,208,619.71/20,442.51
  6. Step 6: Final answer
    x = 11,946.12

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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.