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Finding the Fourth Proportional to 2,021.70, 2,681.06 and 2,021.70

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Solution

The fourth proportional to 2,021.70, 2,681.06 and 2,021.70 is: 2,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.70 : 2,681.06 = 2,021.70 : x
  2. Step 2: Convert to fraction form
    2,021.70/2,681.06 = 2,021.70/x
  3. Step 3: Cross multiply
    2,021.70x = 2,681.06 × 2,021.70
  4. Step 4: Simplify right side
    2,021.70x = 5,420,288.89
  5. Step 5: Solve for x
    x = 5,420,288.89/2,021.70
  6. Step 6: Final answer
    x = 2,681.06

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.