Home / 19,721.64-29,565.18-7,418.28

Finding the Fourth Proportional to 19,721.64, 29,565.18 and 7,418.28

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Solution

The fourth proportional to 19,721.64, 29,565.18 and 7,418.28 is: 11,120.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.64 : 29,565.18 = 7,418.28 : x
  2. Step 2: Convert to fraction form
    19,721.64/29,565.18 = 7,418.28/x
  3. Step 3: Cross multiply
    19,721.64x = 29,565.18 × 7,418.28
  4. Step 4: Simplify right side
    19,721.64x = 219,322,783.49
  5. Step 5: Solve for x
    x = 219,322,783.49/19,721.64
  6. Step 6: Final answer
    x = 11,120.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.