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Finding the Fourth Proportional to 12,666.58, 18,993.42 and 4,230.05

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Solution

The fourth proportional to 12,666.58, 18,993.42 and 4,230.05 is: 6,342.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.58 : 18,993.42 = 4,230.05 : x
  2. Step 2: Convert to fraction form
    12,666.58/18,993.42 = 4,230.05/x
  3. Step 3: Cross multiply
    12,666.58x = 18,993.42 × 4,230.05
  4. Step 4: Simplify right side
    12,666.58x = 80,343,116.27
  5. Step 5: Solve for x
    x = 80,343,116.27/12,666.58
  6. Step 6: Final answer
    x = 6,342.92

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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.