Home / 12,005.60-18,007.80-3,240.32

Finding the Fourth Proportional to 12,005.60, 18,007.80 and 3,240.32

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Solution

The fourth proportional to 12,005.60, 18,007.80 and 3,240.32 is: 4,860.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.60 : 18,007.80 = 3,240.32 : x
  2. Step 2: Convert to fraction form
    12,005.60/18,007.80 = 3,240.32/x
  3. Step 3: Cross multiply
    12,005.60x = 18,007.80 × 3,240.32
  4. Step 4: Simplify right side
    12,005.60x = 58,351,034.50
  5. Step 5: Solve for x
    x = 58,351,034.50/12,005.60
  6. Step 6: Final answer
    x = 4,860.32

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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.