Home / 19,870.40-29,786.15-9,489.44

Finding the Fourth Proportional to 19,870.40, 29,786.15 and 9,489.44

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Solution

The fourth proportional to 19,870.40, 29,786.15 and 9,489.44 is: 14,224.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.40 : 29,786.15 = 9,489.44 : x
  2. Step 2: Convert to fraction form
    19,870.40/29,786.15 = 9,489.44/x
  3. Step 3: Cross multiply
    19,870.40x = 29,786.15 × 9,489.44
  4. Step 4: Simplify right side
    19,870.40x = 282,653,686.88
  5. Step 5: Solve for x
    x = 282,653,686.88/19,870.40
  6. Step 6: Final answer
    x = 14,224.87

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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.