Home / 19,898.53-29,855.88-12,790.72

Finding the Fourth Proportional to 19,898.53, 29,855.88 and 12,790.72

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Solution

The fourth proportional to 19,898.53, 29,855.88 and 12,790.72 is: 19,191.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,898.53 : 29,855.88 = 12,790.72 : x
  2. Step 2: Convert to fraction form
    19,898.53/29,855.88 = 12,790.72/x
  3. Step 3: Cross multiply
    19,898.53x = 29,855.88 × 12,790.72
  4. Step 4: Simplify right side
    19,898.53x = 381,878,201.43
  5. Step 5: Solve for x
    x = 381,878,201.43/19,898.53
  6. Step 6: Final answer
    x = 19,191.28

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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.