Home / 21,679.20-32,518.80-6,886.80

Finding the Fourth Proportional to 21,679.20, 32,518.80 and 6,886.80

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Solution

The fourth proportional to 21,679.20, 32,518.80 and 6,886.80 is: 10,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.20 : 32,518.80 = 6,886.80 : x
  2. Step 2: Convert to fraction form
    21,679.20/32,518.80 = 6,886.80/x
  3. Step 3: Cross multiply
    21,679.20x = 32,518.80 × 6,886.80
  4. Step 4: Simplify right side
    21,679.20x = 223,950,471.84
  5. Step 5: Solve for x
    x = 223,950,471.84/21,679.20
  6. Step 6: Final answer
    x = 10,330.20

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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.