Home / 13,138.03-18,130.48-8,422.31

Finding the Fourth Proportional to 13,138.03, 18,130.48 and 8,422.31

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Solution

The fourth proportional to 13,138.03, 18,130.48 and 8,422.31 is: 11,622.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.03 : 18,130.48 = 8,422.31 : x
  2. Step 2: Convert to fraction form
    13,138.03/18,130.48 = 8,422.31/x
  3. Step 3: Cross multiply
    13,138.03x = 18,130.48 × 8,422.31
  4. Step 4: Simplify right side
    13,138.03x = 152,700,594.65
  5. Step 5: Solve for x
    x = 152,700,594.65/13,138.03
  6. Step 6: Final answer
    x = 11,622.79

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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.