Home / 20,884.10-31,325.70-13,908.80

Finding the Fourth Proportional to 20,884.10, 31,325.70 and 13,908.80

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Solution

The fourth proportional to 20,884.10, 31,325.70 and 13,908.80 is: 20,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.10 : 31,325.70 = 13,908.80 : x
  2. Step 2: Convert to fraction form
    20,884.10/31,325.70 = 13,908.80/x
  3. Step 3: Cross multiply
    20,884.10x = 31,325.70 × 13,908.80
  4. Step 4: Simplify right side
    20,884.10x = 435,702,896.16
  5. Step 5: Solve for x
    x = 435,702,896.16/20,884.10
  6. Step 6: Final answer
    x = 20,862.90

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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.