Home / 19,897.53-29,854.38-12,789.72

Finding the Fourth Proportional to 19,897.53, 29,854.38 and 12,789.72

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Solution

The fourth proportional to 19,897.53, 29,854.38 and 12,789.72 is: 19,189.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,897.53 : 29,854.38 = 12,789.72 : x
  2. Step 2: Convert to fraction form
    19,897.53/29,854.38 = 12,789.72/x
  3. Step 3: Cross multiply
    19,897.53x = 29,854.38 × 12,789.72
  4. Step 4: Simplify right side
    19,897.53x = 381,829,160.97
  5. Step 5: Solve for x
    x = 381,829,160.97/19,897.53
  6. Step 6: Final answer
    x = 19,189.78

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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.