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Finding the Fourth Proportional to 13,900.92, 19,130.68 and 11,058.88

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Solution

The fourth proportional to 13,900.92, 19,130.68 and 11,058.88 is: 15,219.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,900.92 : 19,130.68 = 11,058.88 : x
  2. Step 2: Convert to fraction form
    13,900.92/19,130.68 = 11,058.88/x
  3. Step 3: Cross multiply
    13,900.92x = 19,130.68 × 11,058.88
  4. Step 4: Simplify right side
    13,900.92x = 211,563,894.44
  5. Step 5: Solve for x
    x = 211,563,894.44/13,900.92
  6. Step 6: Final answer
    x = 15,219.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.