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Finding the Fourth Proportional to 14,875.25, 20,520.77 and 8,905.77

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Solution

The fourth proportional to 14,875.25, 20,520.77 and 8,905.77 is: 12,285.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,875.25 : 20,520.77 = 8,905.77 : x
  2. Step 2: Convert to fraction form
    14,875.25/20,520.77 = 8,905.77/x
  3. Step 3: Cross multiply
    14,875.25x = 20,520.77 × 8,905.77
  4. Step 4: Simplify right side
    14,875.25x = 182,753,213.31
  5. Step 5: Solve for x
    x = 182,753,213.31/14,875.25
  6. Step 6: Final answer
    x = 12,285.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.