Home / 20,835.98-31,261.80-12,407.36

Finding the Fourth Proportional to 20,835.98, 31,261.80 and 12,407.36

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Solution

The fourth proportional to 20,835.98, 31,261.80 and 12,407.36 is: 18,615.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.98 : 31,261.80 = 12,407.36 : x
  2. Step 2: Convert to fraction form
    20,835.98/31,261.80 = 12,407.36/x
  3. Step 3: Cross multiply
    20,835.98x = 31,261.80 × 12,407.36
  4. Step 4: Simplify right side
    20,835.98x = 387,876,297.07
  5. Step 5: Solve for x
    x = 387,876,297.07/20,835.98
  6. Step 6: Final answer
    x = 18,615.70

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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.