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Finding the Fourth Proportional to 14,580.64, 20,119.92 and 8,292.80

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Solution

The fourth proportional to 14,580.64, 20,119.92 and 8,292.80 is: 11,443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,580.64 : 20,119.92 = 8,292.80 : x
  2. Step 2: Convert to fraction form
    14,580.64/20,119.92 = 8,292.80/x
  3. Step 3: Cross multiply
    14,580.64x = 20,119.92 × 8,292.80
  4. Step 4: Simplify right side
    14,580.64x = 166,850,472.58
  5. Step 5: Solve for x
    x = 166,850,472.58/14,580.64
  6. Step 6: Final answer
    x = 11,443.29

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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.