Home / 12,420.48-18,619.44-8,040

Finding the Fourth Proportional to 12,420.48, 18,619.44 and 8,040

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Solution

The fourth proportional to 12,420.48, 18,619.44 and 8,040 is: 12,052.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.48 : 18,619.44 = 8,040 : x
  2. Step 2: Convert to fraction form
    12,420.48/18,619.44 = 8,040/x
  3. Step 3: Cross multiply
    12,420.48x = 18,619.44 × 8,040
  4. Step 4: Simplify right side
    12,420.48x = 149,700,297.60
  5. Step 5: Solve for x
    x = 149,700,297.60/12,420.48
  6. Step 6: Final answer
    x = 12,052.70

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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.