Home / 20,928.72-31,361.64-18,953.04

Finding the Fourth Proportional to 20,928.72, 31,361.64 and 18,953.04

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Solution

The fourth proportional to 20,928.72, 31,361.64 and 18,953.04 is: 28,401.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.72 : 31,361.64 = 18,953.04 : x
  2. Step 2: Convert to fraction form
    20,928.72/31,361.64 = 18,953.04/x
  3. Step 3: Cross multiply
    20,928.72x = 31,361.64 × 18,953.04
  4. Step 4: Simplify right side
    20,928.72x = 594,398,417.39
  5. Step 5: Solve for x
    x = 594,398,417.39/20,928.72
  6. Step 6: Final answer
    x = 28,401.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.