Home / 19,610.21-29,406.08-7,121.40

Finding the Fourth Proportional to 19,610.21, 29,406.08 and 7,121.40

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Solution

The fourth proportional to 19,610.21, 29,406.08 and 7,121.40 is: 10,678.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,610.21 : 29,406.08 = 7,121.40 : x
  2. Step 2: Convert to fraction form
    19,610.21/29,406.08 = 7,121.40/x
  3. Step 3: Cross multiply
    19,610.21x = 29,406.08 × 7,121.40
  4. Step 4: Simplify right side
    19,610.21x = 209,412,422.51
  5. Step 5: Solve for x
    x = 209,412,422.51/19,610.21
  6. Step 6: Final answer
    x = 10,678.75

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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.