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Finding the Fourth Proportional to 20,483.57, 30,725.46 and 7,156.51

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Solution

The fourth proportional to 20,483.57, 30,725.46 and 7,156.51 is: 10,734.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.57 : 30,725.46 = 7,156.51 : x
  2. Step 2: Convert to fraction form
    20,483.57/30,725.46 = 7,156.51/x
  3. Step 3: Cross multiply
    20,483.57x = 30,725.46 × 7,156.51
  4. Step 4: Simplify right side
    20,483.57x = 219,887,073.31
  5. Step 5: Solve for x
    x = 219,887,073.31/20,483.57
  6. Step 6: Final answer
    x = 10,734.80

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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.