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Finding the Fourth Proportional to 20,490.93, 30,725.82 and 9,388.10

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Solution

The fourth proportional to 20,490.93, 30,725.82 and 9,388.10 is: 14,077.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.93 : 30,725.82 = 9,388.10 : x
  2. Step 2: Convert to fraction form
    20,490.93/30,725.82 = 9,388.10/x
  3. Step 3: Cross multiply
    20,490.93x = 30,725.82 × 9,388.10
  4. Step 4: Simplify right side
    20,490.93x = 288,457,070.74
  5. Step 5: Solve for x
    x = 288,457,070.74/20,490.93
  6. Step 6: Final answer
    x = 14,077.30

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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.