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Finding the Fourth Proportional to 20,392,541.70, 30,588,812.55 and 11,771,387.70

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Solution

The fourth proportional to 20,392,541.70, 30,588,812.55 and 11,771,387.70 is: 17,657,081.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392,541.70 : 30,588,812.55 = 11,771,387.70 : x
  2. Step 2: Convert to fraction form
    20,392,541.70/30,588,812.55 = 11,771,387.70/x
  3. Step 3: Cross multiply
    20,392,541.70x = 30,588,812.55 × 11,771,387.70
  4. Step 4: Simplify right side
    20,392,541.70x = 360,072,771,808,675.62
  5. Step 5: Solve for x
    x = 360,072,771,808,675.62/20,392,541.70
  6. Step 6: Final answer
    x = 17,657,081.55

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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.