Home / 20,804.61-31,214.80-12,490.44

Finding the Fourth Proportional to 20,804.61, 31,214.80 and 12,490.44

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Solution

The fourth proportional to 20,804.61, 31,214.80 and 12,490.44 is: 18,740.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.61 : 31,214.80 = 12,490.44 : x
  2. Step 2: Convert to fraction form
    20,804.61/31,214.80 = 12,490.44/x
  3. Step 3: Cross multiply
    20,804.61x = 31,214.80 × 12,490.44
  4. Step 4: Simplify right side
    20,804.61x = 389,886,485.07
  5. Step 5: Solve for x
    x = 389,886,485.07/20,804.61
  6. Step 6: Final answer
    x = 18,740.39

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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.