Home / 13,698.04-18,912.54-8,990.32

Finding the Fourth Proportional to 13,698.04, 18,912.54 and 8,990.32

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Solution

The fourth proportional to 13,698.04, 18,912.54 and 8,990.32 is: 12,412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.04 : 18,912.54 = 8,990.32 : x
  2. Step 2: Convert to fraction form
    13,698.04/18,912.54 = 8,990.32/x
  3. Step 3: Cross multiply
    13,698.04x = 18,912.54 × 8,990.32
  4. Step 4: Simplify right side
    13,698.04x = 170,029,786.61
  5. Step 5: Solve for x
    x = 170,029,786.61/13,698.04
  6. Step 6: Final answer
    x = 12,412.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.