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Finding the Fourth Proportional to 20,231.20, 30,332.40 and 7,746.40

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Solution

The fourth proportional to 20,231.20, 30,332.40 and 7,746.40 is: 11,614.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.20 : 30,332.40 = 7,746.40 : x
  2. Step 2: Convert to fraction form
    20,231.20/30,332.40 = 7,746.40/x
  3. Step 3: Cross multiply
    20,231.20x = 30,332.40 × 7,746.40
  4. Step 4: Simplify right side
    20,231.20x = 234,966,903.36
  5. Step 5: Solve for x
    x = 234,966,903.36/20,231.20
  6. Step 6: Final answer
    x = 11,614.09

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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.