Home / 19,781.20-27,297.84-10,828.72

Finding the Fourth Proportional to 19,781.20, 27,297.84 and 10,828.72

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Solution

The fourth proportional to 19,781.20, 27,297.84 and 10,828.72 is: 14,943.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.20 : 27,297.84 = 10,828.72 : x
  2. Step 2: Convert to fraction form
    19,781.20/27,297.84 = 10,828.72/x
  3. Step 3: Cross multiply
    19,781.20x = 27,297.84 × 10,828.72
  4. Step 4: Simplify right side
    19,781.20x = 295,600,597.72
  5. Step 5: Solve for x
    x = 295,600,597.72/19,781.20
  6. Step 6: Final answer
    x = 14,943.51

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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.