Home / 13,828.40-20,742.60-13,007.60

Finding the Fourth Proportional to 13,828.40, 20,742.60 and 13,007.60

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Solution

The fourth proportional to 13,828.40, 20,742.60 and 13,007.60 is: 19,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,828.40 : 20,742.60 = 13,007.60 : x
  2. Step 2: Convert to fraction form
    13,828.40/20,742.60 = 13,007.60/x
  3. Step 3: Cross multiply
    13,828.40x = 20,742.60 × 13,007.60
  4. Step 4: Simplify right side
    13,828.40x = 269,811,443.76
  5. Step 5: Solve for x
    x = 269,811,443.76/13,828.40
  6. Step 6: Final answer
    x = 19,511.40

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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.