Home / 21,009.24-31,351.23-18,682.20

Finding the Fourth Proportional to 21,009.24, 31,351.23 and 18,682.20

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Solution

The fourth proportional to 21,009.24, 31,351.23 and 18,682.20 is: 27,878.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.24 : 31,351.23 = 18,682.20 : x
  2. Step 2: Convert to fraction form
    21,009.24/31,351.23 = 18,682.20/x
  3. Step 3: Cross multiply
    21,009.24x = 31,351.23 × 18,682.20
  4. Step 4: Simplify right side
    21,009.24x = 585,709,949.11
  5. Step 5: Solve for x
    x = 585,709,949.11/21,009.24
  6. Step 6: Final answer
    x = 27,878.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.