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Finding the Fourth Proportional to 16,830.70, 25,217.70 and 13,307.20

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Solution

The fourth proportional to 16,830.70, 25,217.70 and 13,307.20 is: 19,938.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,830.70 : 25,217.70 = 13,307.20 : x
  2. Step 2: Convert to fraction form
    16,830.70/25,217.70 = 13,307.20/x
  3. Step 3: Cross multiply
    16,830.70x = 25,217.70 × 13,307.20
  4. Step 4: Simplify right side
    16,830.70x = 335,576,977.44
  5. Step 5: Solve for x
    x = 335,576,977.44/16,830.70
  6. Step 6: Final answer
    x = 19,938.39

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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.