Home / 31,483.93-43,434.57-20,855.11

Finding the Fourth Proportional to 31,483.93, 43,434.57 and 20,855.11

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Solution

The fourth proportional to 31,483.93, 43,434.57 and 20,855.11 is: 28,771.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,483.93 : 43,434.57 = 20,855.11 : x
  2. Step 2: Convert to fraction form
    31,483.93/43,434.57 = 20,855.11/x
  3. Step 3: Cross multiply
    31,483.93x = 43,434.57 × 20,855.11
  4. Step 4: Simplify right side
    31,483.93x = 905,832,735.15
  5. Step 5: Solve for x
    x = 905,832,735.15/31,483.93
  6. Step 6: Final answer
    x = 28,771.27

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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.