Home / 13,622.40-18,789.57-13,165.29

Finding the Fourth Proportional to 13,622.40, 18,789.57 and 13,165.29

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Solution

The fourth proportional to 13,622.40, 18,789.57 and 13,165.29 is: 18,159.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,622.40 : 18,789.57 = 13,165.29 : x
  2. Step 2: Convert to fraction form
    13,622.40/18,789.57 = 13,165.29/x
  3. Step 3: Cross multiply
    13,622.40x = 18,789.57 × 13,165.29
  4. Step 4: Simplify right side
    13,622.40x = 247,370,138.03
  5. Step 5: Solve for x
    x = 247,370,138.03/13,622.40
  6. Step 6: Final answer
    x = 18,159.07

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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.