Home / 20,763.51-31,187.19-12,459.30

Finding the Fourth Proportional to 20,763.51, 31,187.19 and 12,459.30

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Solution

The fourth proportional to 20,763.51, 31,187.19 and 12,459.30 is: 18,714.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.51 : 31,187.19 = 12,459.30 : x
  2. Step 2: Convert to fraction form
    20,763.51/31,187.19 = 12,459.30/x
  3. Step 3: Cross multiply
    20,763.51x = 31,187.19 × 12,459.30
  4. Step 4: Simplify right side
    20,763.51x = 388,570,556.37
  5. Step 5: Solve for x
    x = 388,570,556.37/20,763.51
  6. Step 6: Final answer
    x = 18,714.11

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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.