Home / 19,788.24-27,321.16-12,622.20

Finding the Fourth Proportional to 19,788.24, 27,321.16 and 12,622.20

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Solution

The fourth proportional to 19,788.24, 27,321.16 and 12,622.20 is: 17,427.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,788.24 : 27,321.16 = 12,622.20 : x
  2. Step 2: Convert to fraction form
    19,788.24/27,321.16 = 12,622.20/x
  3. Step 3: Cross multiply
    19,788.24x = 27,321.16 × 12,622.20
  4. Step 4: Simplify right side
    19,788.24x = 344,853,145.75
  5. Step 5: Solve for x
    x = 344,853,145.75/19,788.24
  6. Step 6: Final answer
    x = 17,427.18

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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.