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Finding the Fourth Proportional to 14,871.92, 20,515.48 and 8,818.64

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Solution

The fourth proportional to 14,871.92, 20,515.48 and 8,818.64 is: 12,165.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,871.92 : 20,515.48 = 8,818.64 : x
  2. Step 2: Convert to fraction form
    14,871.92/20,515.48 = 8,818.64/x
  3. Step 3: Cross multiply
    14,871.92x = 20,515.48 × 8,818.64
  4. Step 4: Simplify right side
    14,871.92x = 180,918,584.86
  5. Step 5: Solve for x
    x = 180,918,584.86/14,871.92
  6. Step 6: Final answer
    x = 12,165.11

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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.