Home / 19,790.90-29,694.18-8,689.85

Finding the Fourth Proportional to 19,790.90, 29,694.18 and 8,689.85

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Solution

The fourth proportional to 19,790.90, 29,694.18 and 8,689.85 is: 13,038.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.90 : 29,694.18 = 8,689.85 : x
  2. Step 2: Convert to fraction form
    19,790.90/29,694.18 = 8,689.85/x
  3. Step 3: Cross multiply
    19,790.90x = 29,694.18 × 8,689.85
  4. Step 4: Simplify right side
    19,790.90x = 258,037,970.07
  5. Step 5: Solve for x
    x = 258,037,970.07/19,790.90
  6. Step 6: Final answer
    x = 13,038.21

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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.