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Finding the Fourth Proportional to 20,647.21, 30,970.83 and 5,064.83

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Solution

The fourth proportional to 20,647.21, 30,970.83 and 5,064.83 is: 7,597.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.21 : 30,970.83 = 5,064.83 : x
  2. Step 2: Convert to fraction form
    20,647.21/30,970.83 = 5,064.83/x
  3. Step 3: Cross multiply
    20,647.21x = 30,970.83 × 5,064.83
  4. Step 4: Simplify right side
    20,647.21x = 156,862,085.33
  5. Step 5: Solve for x
    x = 156,862,085.33/20,647.21
  6. Step 6: Final answer
    x = 7,597.25

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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.