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Finding the Fourth Proportional to 20,394.23, 30,602.49 and 7,914.74

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Solution

The fourth proportional to 20,394.23, 30,602.49 and 7,914.74 is: 11,876.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.23 : 30,602.49 = 7,914.74 : x
  2. Step 2: Convert to fraction form
    20,394.23/30,602.49 = 7,914.74/x
  3. Step 3: Cross multiply
    20,394.23x = 30,602.49 × 7,914.74
  4. Step 4: Simplify right side
    20,394.23x = 242,210,828.21
  5. Step 5: Solve for x
    x = 242,210,828.21/20,394.23
  6. Step 6: Final answer
    x = 11,876.44

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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.