Home / 13,621.33-18,803.81-9,091.58

Finding the Fourth Proportional to 13,621.33, 18,803.81 and 9,091.58

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Solution

The fourth proportional to 13,621.33, 18,803.81 and 9,091.58 is: 12,550.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.33 : 18,803.81 = 9,091.58 : x
  2. Step 2: Convert to fraction form
    13,621.33/18,803.81 = 9,091.58/x
  3. Step 3: Cross multiply
    13,621.33x = 18,803.81 × 9,091.58
  4. Step 4: Simplify right side
    13,621.33x = 170,956,271.63
  5. Step 5: Solve for x
    x = 170,956,271.63/13,621.33
  6. Step 6: Final answer
    x = 12,550.63

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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.