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Finding the Fourth Proportional to 20,533.30, 30,788.16 and 8,038.71

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Solution

The fourth proportional to 20,533.30, 30,788.16 and 8,038.71 is: 12,053.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,533.30 : 30,788.16 = 8,038.71 : x
  2. Step 2: Convert to fraction form
    20,533.30/30,788.16 = 8,038.71/x
  3. Step 3: Cross multiply
    20,533.30x = 30,788.16 × 8,038.71
  4. Step 4: Simplify right side
    20,533.30x = 247,497,089.67
  5. Step 5: Solve for x
    x = 247,497,089.67/20,533.30
  6. Step 6: Final answer
    x = 12,053.45

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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.