Home / 20,419.78-28,185.22-12,353.44

Finding the Fourth Proportional to 20,419.78, 28,185.22 and 12,353.44

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Solution

The fourth proportional to 20,419.78, 28,185.22 and 12,353.44 is: 17,051.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.78 : 28,185.22 = 12,353.44 : x
  2. Step 2: Convert to fraction form
    20,419.78/28,185.22 = 12,353.44/x
  3. Step 3: Cross multiply
    20,419.78x = 28,185.22 × 12,353.44
  4. Step 4: Simplify right side
    20,419.78x = 348,184,424.16
  5. Step 5: Solve for x
    x = 348,184,424.16/20,419.78
  6. Step 6: Final answer
    x = 17,051.33

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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.