Home / 20,622.96-28,459.44-12,130.56

Finding the Fourth Proportional to 20,622.96, 28,459.44 and 12,130.56

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Solution

The fourth proportional to 20,622.96, 28,459.44 and 12,130.56 is: 16,740.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.96 : 28,459.44 = 12,130.56 : x
  2. Step 2: Convert to fraction form
    20,622.96/28,459.44 = 12,130.56/x
  3. Step 3: Cross multiply
    20,622.96x = 28,459.44 × 12,130.56
  4. Step 4: Simplify right side
    20,622.96x = 345,228,944.49
  5. Step 5: Solve for x
    x = 345,228,944.49/20,622.96
  6. Step 6: Final answer
    x = 16,740.03

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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.