Home / 28,921.08-43,352.46-21,981

Finding the Fourth Proportional to 28,921.08, 43,352.46 and 21,981

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Solution

The fourth proportional to 28,921.08, 43,352.46 and 21,981 is: 32,949.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.08 : 43,352.46 = 21,981 : x
  2. Step 2: Convert to fraction form
    28,921.08/43,352.46 = 21,981/x
  3. Step 3: Cross multiply
    28,921.08x = 43,352.46 × 21,981
  4. Step 4: Simplify right side
    28,921.08x = 952,930,423.26
  5. Step 5: Solve for x
    x = 952,930,423.26/28,921.08
  6. Step 6: Final answer
    x = 32,949.34

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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.