Home / 20,415.08-28,170.78-12,459.26

Finding the Fourth Proportional to 20,415.08, 28,170.78 and 12,459.26

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Solution

The fourth proportional to 20,415.08, 28,170.78 and 12,459.26 is: 17,192.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.08 : 28,170.78 = 12,459.26 : x
  2. Step 2: Convert to fraction form
    20,415.08/28,170.78 = 12,459.26/x
  3. Step 3: Cross multiply
    20,415.08x = 28,170.78 × 12,459.26
  4. Step 4: Simplify right side
    20,415.08x = 350,987,072.42
  5. Step 5: Solve for x
    x = 350,987,072.42/20,415.08
  6. Step 6: Final answer
    x = 17,192.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.