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Finding the Fourth Proportional to 43,291.99, 64,931.49 and 13,705.99

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Solution

The fourth proportional to 43,291.99, 64,931.49 and 13,705.99 is: 20,556.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,291.99 : 64,931.49 = 13,705.99 : x
  2. Step 2: Convert to fraction form
    43,291.99/64,931.49 = 13,705.99/x
  3. Step 3: Cross multiply
    43,291.99x = 64,931.49 × 13,705.99
  4. Step 4: Simplify right side
    43,291.99x = 889,950,352.63
  5. Step 5: Solve for x
    x = 889,950,352.63/43,291.99
  6. Step 6: Final answer
    x = 20,556.93

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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.