Home / 20,361.72-28,099.18-12,403.94

Finding the Fourth Proportional to 20,361.72, 28,099.18 and 12,403.94

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Solution

The fourth proportional to 20,361.72, 28,099.18 and 12,403.94 is: 17,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.72 : 28,099.18 = 12,403.94 : x
  2. Step 2: Convert to fraction form
    20,361.72/28,099.18 = 12,403.94/x
  3. Step 3: Cross multiply
    20,361.72x = 28,099.18 × 12,403.94
  4. Step 4: Simplify right side
    20,361.72x = 348,540,633.06
  5. Step 5: Solve for x
    x = 348,540,633.06/20,361.72
  6. Step 6: Final answer
    x = 17,117.45

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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.