Home / 13,722.75-20,549.25-12,459.08

Finding the Fourth Proportional to 13,722.75, 20,549.25 and 12,459.08

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Solution

The fourth proportional to 13,722.75, 20,549.25 and 12,459.08 is: 18,656.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.75 : 20,549.25 = 12,459.08 : x
  2. Step 2: Convert to fraction form
    13,722.75/20,549.25 = 12,459.08/x
  3. Step 3: Cross multiply
    13,722.75x = 20,549.25 × 12,459.08
  4. Step 4: Simplify right side
    13,722.75x = 256,024,801.06
  5. Step 5: Solve for x
    x = 256,024,801.06/13,722.75
  6. Step 6: Final answer
    x = 18,656.96

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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.