Home / 20,647.20-28,494.72-12,579.84

Finding the Fourth Proportional to 20,647.20, 28,494.72 and 12,579.84

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Solution

The fourth proportional to 20,647.20, 28,494.72 and 12,579.84 is: 17,361.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.20 : 28,494.72 = 12,579.84 : x
  2. Step 2: Convert to fraction form
    20,647.20/28,494.72 = 12,579.84/x
  3. Step 3: Cross multiply
    20,647.20x = 28,494.72 × 12,579.84
  4. Step 4: Simplify right side
    20,647.20x = 358,459,018.44
  5. Step 5: Solve for x
    x = 358,459,018.44/20,647.20
  6. Step 6: Final answer
    x = 17,361.14

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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.