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Finding the Fourth Proportional to 18,927.34, 28,388.75 and 7,832.70

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Solution

The fourth proportional to 18,927.34, 28,388.75 and 7,832.70 is: 11,748.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.34 : 28,388.75 = 7,832.70 : x
  2. Step 2: Convert to fraction form
    18,927.34/28,388.75 = 7,832.70/x
  3. Step 3: Cross multiply
    18,927.34x = 28,388.75 × 7,832.70
  4. Step 4: Simplify right side
    18,927.34x = 222,360,522.96
  5. Step 5: Solve for x
    x = 222,360,522.96/18,927.34
  6. Step 6: Final answer
    x = 11,748.11

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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.