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Finding the Fourth Proportional to 12,071.70, 16,911.90 and 12,071.70

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Solution

The fourth proportional to 12,071.70, 16,911.90 and 12,071.70 is: 16,911.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,071.70 : 16,911.90 = 12,071.70 : x
  2. Step 2: Convert to fraction form
    12,071.70/16,911.90 = 12,071.70/x
  3. Step 3: Cross multiply
    12,071.70x = 16,911.90 × 12,071.70
  4. Step 4: Simplify right side
    12,071.70x = 204,155,383.23
  5. Step 5: Solve for x
    x = 204,155,383.23/12,071.70
  6. Step 6: Final answer
    x = 16,911.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.