Home / 13,990.05-20,985.26-4,129.47

Finding the Fourth Proportional to 13,990.05, 20,985.26 and 4,129.47

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Solution

The fourth proportional to 13,990.05, 20,985.26 and 4,129.47 is: 6,194.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.05 : 20,985.26 = 4,129.47 : x
  2. Step 2: Convert to fraction form
    13,990.05/20,985.26 = 4,129.47/x
  3. Step 3: Cross multiply
    13,990.05x = 20,985.26 × 4,129.47
  4. Step 4: Simplify right side
    13,990.05x = 86,657,980.96
  5. Step 5: Solve for x
    x = 86,657,980.96/13,990.05
  6. Step 6: Final answer
    x = 6,194.26

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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.