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Finding the Fourth Proportional to 20,599,387.80, 30,899,081.70 and 11,529,461.40

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Solution

The fourth proportional to 20,599,387.80, 30,899,081.70 and 11,529,461.40 is: 17,294,192.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599,387.80 : 30,899,081.70 = 11,529,461.40 : x
  2. Step 2: Convert to fraction form
    20,599,387.80/30,899,081.70 = 11,529,461.40/x
  3. Step 3: Cross multiply
    20,599,387.80x = 30,899,081.70 × 11,529,461.40
  4. Step 4: Simplify right side
    20,599,387.80x = 356,249,769,755,596.38
  5. Step 5: Solve for x
    x = 356,249,769,755,596.38/20,599,387.80
  6. Step 6: Final answer
    x = 17,294,192.10

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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.