Home / 12,009.76-18,015.60-4,220.32

Finding the Fourth Proportional to 12,009.76, 18,015.60 and 4,220.32

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Solution

The fourth proportional to 12,009.76, 18,015.60 and 4,220.32 is: 6,330.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,009.76 : 18,015.60 = 4,220.32 : x
  2. Step 2: Convert to fraction form
    12,009.76/18,015.60 = 4,220.32/x
  3. Step 3: Cross multiply
    12,009.76x = 18,015.60 × 4,220.32
  4. Step 4: Simplify right side
    12,009.76x = 76,031,596.99
  5. Step 5: Solve for x
    x = 76,031,596.99/12,009.76
  6. Step 6: Final answer
    x = 6,330.82

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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.