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Finding the Fourth Proportional to 12,672.45, 18,999.05 and 9,904.95

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Solution

The fourth proportional to 12,672.45, 18,999.05 and 9,904.95 is: 14,849.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.45 : 18,999.05 = 9,904.95 : x
  2. Step 2: Convert to fraction form
    12,672.45/18,999.05 = 9,904.95/x
  3. Step 3: Cross multiply
    12,672.45x = 18,999.05 × 9,904.95
  4. Step 4: Simplify right side
    12,672.45x = 188,184,590.77
  5. Step 5: Solve for x
    x = 188,184,590.77/12,672.45
  6. Step 6: Final answer
    x = 14,849.90

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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.