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Finding the Fourth Proportional to 14,776.92, 20,392.02 and 8,489.40

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Solution

The fourth proportional to 14,776.92, 20,392.02 and 8,489.40 is: 11,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,776.92 : 20,392.02 = 8,489.40 : x
  2. Step 2: Convert to fraction form
    14,776.92/20,392.02 = 8,489.40/x
  3. Step 3: Cross multiply
    14,776.92x = 20,392.02 × 8,489.40
  4. Step 4: Simplify right side
    14,776.92x = 173,116,014.59
  5. Step 5: Solve for x
    x = 173,116,014.59/14,776.92
  6. Step 6: Final answer
    x = 11,715.30

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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.