Home / 13,990.70-20,993.09-8,724.35

Finding the Fourth Proportional to 13,990.70, 20,993.09 and 8,724.35

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Solution

The fourth proportional to 13,990.70, 20,993.09 and 8,724.35 is: 13,090.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.70 : 20,993.09 = 8,724.35 : x
  2. Step 2: Convert to fraction form
    13,990.70/20,993.09 = 8,724.35/x
  3. Step 3: Cross multiply
    13,990.70x = 20,993.09 × 8,724.35
  4. Step 4: Simplify right side
    13,990.70x = 183,151,064.74
  5. Step 5: Solve for x
    x = 183,151,064.74/13,990.70
  6. Step 6: Final answer
    x = 13,090.92

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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.