Home / 13,158.80-19,738.20-11,117.60

Finding the Fourth Proportional to 13,158.80, 19,738.20 and 11,117.60

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Solution

The fourth proportional to 13,158.80, 19,738.20 and 11,117.60 is: 16,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.80 : 19,738.20 = 11,117.60 : x
  2. Step 2: Convert to fraction form
    13,158.80/19,738.20 = 11,117.60/x
  3. Step 3: Cross multiply
    13,158.80x = 19,738.20 × 11,117.60
  4. Step 4: Simplify right side
    13,158.80x = 219,441,412.32
  5. Step 5: Solve for x
    x = 219,441,412.32/13,158.80
  6. Step 6: Final answer
    x = 16,676.40

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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.