Home / 21,418.80-32,116.20-8,271.60

Finding the Fourth Proportional to 21,418.80, 32,116.20 and 8,271.60

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Solution

The fourth proportional to 21,418.80, 32,116.20 and 8,271.60 is: 12,402.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.80 : 32,116.20 = 8,271.60 : x
  2. Step 2: Convert to fraction form
    21,418.80/32,116.20 = 8,271.60/x
  3. Step 3: Cross multiply
    21,418.80x = 32,116.20 × 8,271.60
  4. Step 4: Simplify right side
    21,418.80x = 265,652,359.92
  5. Step 5: Solve for x
    x = 265,652,359.92/21,418.80
  6. Step 6: Final answer
    x = 12,402.77

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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.