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Finding the Fourth Proportional to 20,999.70, 31,694.00 and 20,999.70

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Solution

The fourth proportional to 20,999.70, 31,694.00 and 20,999.70 is: 31,694.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.70 : 31,694.00 = 20,999.70 : x
  2. Step 2: Convert to fraction form
    20,999.70/31,694.00 = 20,999.70/x
  3. Step 3: Cross multiply
    20,999.70x = 31,694.00 × 20,999.70
  4. Step 4: Simplify right side
    20,999.70x = 665,564,386.80
  5. Step 5: Solve for x
    x = 665,564,386.80/20,999.70
  6. Step 6: Final answer
    x = 31,694.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.