Home / 12,939.60-19,355.40-11,786.16

Finding the Fourth Proportional to 12,939.60, 19,355.40 and 11,786.16

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Solution

The fourth proportional to 12,939.60, 19,355.40 and 11,786.16 is: 17,630.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.60 : 19,355.40 = 11,786.16 : x
  2. Step 2: Convert to fraction form
    12,939.60/19,355.40 = 11,786.16/x
  3. Step 3: Cross multiply
    12,939.60x = 19,355.40 × 11,786.16
  4. Step 4: Simplify right side
    12,939.60x = 228,125,841.26
  5. Step 5: Solve for x
    x = 228,125,841.26/12,939.60
  6. Step 6: Final answer
    x = 17,630.05

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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.