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Finding the Fourth Proportional to 12,140.08, 18,210.80 and 3,374.80

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Solution

The fourth proportional to 12,140.08, 18,210.80 and 3,374.80 is: 5,062.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.08 : 18,210.80 = 3,374.80 : x
  2. Step 2: Convert to fraction form
    12,140.08/18,210.80 = 3,374.80/x
  3. Step 3: Cross multiply
    12,140.08x = 18,210.80 × 3,374.80
  4. Step 4: Simplify right side
    12,140.08x = 61,457,807.84
  5. Step 5: Solve for x
    x = 61,457,807.84/12,140.08
  6. Step 6: Final answer
    x = 5,062.39

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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.