Home / 21,390.56-32,078.16-8,236.32

Finding the Fourth Proportional to 21,390.56, 32,078.16 and 8,236.32

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Solution

The fourth proportional to 21,390.56, 32,078.16 and 8,236.32 is: 12,351.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.56 : 32,078.16 = 8,236.32 : x
  2. Step 2: Convert to fraction form
    21,390.56/32,078.16 = 8,236.32/x
  3. Step 3: Cross multiply
    21,390.56x = 32,078.16 × 8,236.32
  4. Step 4: Simplify right side
    21,390.56x = 264,205,990.77
  5. Step 5: Solve for x
    x = 264,205,990.77/21,390.56
  6. Step 6: Final answer
    x = 12,351.52

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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.