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Finding the Fourth Proportional to 12,558.30, 18,805.05 and 9,966.30

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Solution

The fourth proportional to 12,558.30, 18,805.05 and 9,966.30 is: 14,923.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,558.30 : 18,805.05 = 9,966.30 : x
  2. Step 2: Convert to fraction form
    12,558.30/18,805.05 = 9,966.30/x
  3. Step 3: Cross multiply
    12,558.30x = 18,805.05 × 9,966.30
  4. Step 4: Simplify right side
    12,558.30x = 187,416,769.82
  5. Step 5: Solve for x
    x = 187,416,769.82/12,558.30
  6. Step 6: Final answer
    x = 14,923.74

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1.5x scale

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.