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Finding the Fourth Proportional to 12,000.72, 18,001.05 and 4,209.54

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Solution

The fourth proportional to 12,000.72, 18,001.05 and 4,209.54 is: 6,314.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,000.72 : 18,001.05 = 4,209.54 : x
  2. Step 2: Convert to fraction form
    12,000.72/18,001.05 = 4,209.54/x
  3. Step 3: Cross multiply
    12,000.72x = 18,001.05 × 4,209.54
  4. Step 4: Simplify right side
    12,000.72x = 75,776,140.02
  5. Step 5: Solve for x
    x = 75,776,140.02/12,000.72
  6. Step 6: Final answer
    x = 6,314.30

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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.