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Finding the Fourth Proportional to 19,802.70, 29,704.05 and 13,897.80

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Solution

The fourth proportional to 19,802.70, 29,704.05 and 13,897.80 is: 20,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,802.70 : 29,704.05 = 13,897.80 : x
  2. Step 2: Convert to fraction form
    19,802.70/29,704.05 = 13,897.80/x
  3. Step 3: Cross multiply
    19,802.70x = 29,704.05 × 13,897.80
  4. Step 4: Simplify right side
    19,802.70x = 412,820,946.09
  5. Step 5: Solve for x
    x = 412,820,946.09/19,802.70
  6. Step 6: Final answer
    x = 20,846.70

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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.