Home / 19,787.90-29,689.68-8,686.85

Finding the Fourth Proportional to 19,787.90, 29,689.68 and 8,686.85

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Solution

The fourth proportional to 19,787.90, 29,689.68 and 8,686.85 is: 13,033.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,787.90 : 29,689.68 = 8,686.85 : x
  2. Step 2: Convert to fraction form
    19,787.90/29,689.68 = 8,686.85/x
  3. Step 3: Cross multiply
    19,787.90x = 29,689.68 × 8,686.85
  4. Step 4: Simplify right side
    19,787.90x = 257,909,796.71
  5. Step 5: Solve for x
    x = 257,909,796.71/19,787.90
  6. Step 6: Final answer
    x = 13,033.71

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1.5x scale

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.