Home / 13,784.48-20,672.40-7,207.20

Finding the Fourth Proportional to 13,784.48, 20,672.40 and 7,207.20

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Solution

The fourth proportional to 13,784.48, 20,672.40 and 7,207.20 is: 10,808.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,784.48 : 20,672.40 = 7,207.20 : x
  2. Step 2: Convert to fraction form
    13,784.48/20,672.40 = 7,207.20/x
  3. Step 3: Cross multiply
    13,784.48x = 20,672.40 × 7,207.20
  4. Step 4: Simplify right side
    13,784.48x = 148,990,121.28
  5. Step 5: Solve for x
    x = 148,990,121.28/13,784.48
  6. Step 6: Final answer
    x = 10,808.54

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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.