Home / 19,707.48-27,199.70-18,821.72

Finding the Fourth Proportional to 19,707.48, 27,199.70 and 18,821.72

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Solution

The fourth proportional to 19,707.48, 27,199.70 and 18,821.72 is: 25,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,707.48 : 27,199.70 = 18,821.72 : x
  2. Step 2: Convert to fraction form
    19,707.48/27,199.70 = 18,821.72/x
  3. Step 3: Cross multiply
    19,707.48x = 27,199.70 × 18,821.72
  4. Step 4: Simplify right side
    19,707.48x = 511,945,137.48
  5. Step 5: Solve for x
    x = 511,945,137.48/19,707.48
  6. Step 6: Final answer
    x = 25,977.20

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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.