Home / 13,286.40-19,929.60-11,558.40

Finding the Fourth Proportional to 13,286.40, 19,929.60 and 11,558.40

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Solution

The fourth proportional to 13,286.40, 19,929.60 and 11,558.40 is: 17,337.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.40 : 19,929.60 = 11,558.40 : x
  2. Step 2: Convert to fraction form
    13,286.40/19,929.60 = 11,558.40/x
  3. Step 3: Cross multiply
    13,286.40x = 19,929.60 × 11,558.40
  4. Step 4: Simplify right side
    13,286.40x = 230,354,288.64
  5. Step 5: Solve for x
    x = 230,354,288.64/13,286.40
  6. Step 6: Final answer
    x = 17,337.60

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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.