Home / 12,666.30-18,999.45-9,385.80

Finding the Fourth Proportional to 12,666.30, 18,999.45 and 9,385.80

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Solution

The fourth proportional to 12,666.30, 18,999.45 and 9,385.80 is: 14,078.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.30 : 18,999.45 = 9,385.80 : x
  2. Step 2: Convert to fraction form
    12,666.30/18,999.45 = 9,385.80/x
  3. Step 3: Cross multiply
    12,666.30x = 18,999.45 × 9,385.80
  4. Step 4: Simplify right side
    12,666.30x = 178,325,037.81
  5. Step 5: Solve for x
    x = 178,325,037.81/12,666.30
  6. Step 6: Final answer
    x = 14,078.70

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Similar ratio
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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.