Home / 18,683.36-28,016.40-6,989.12

Finding the Fourth Proportional to 18,683.36, 28,016.40 and 6,989.12

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Solution

The fourth proportional to 18,683.36, 28,016.40 and 6,989.12 is: 10,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.36 : 28,016.40 = 6,989.12 : x
  2. Step 2: Convert to fraction form
    18,683.36/28,016.40 = 6,989.12/x
  3. Step 3: Cross multiply
    18,683.36x = 28,016.40 × 6,989.12
  4. Step 4: Simplify right side
    18,683.36x = 195,809,981.57
  5. Step 5: Solve for x
    x = 195,809,981.57/18,683.36
  6. Step 6: Final answer
    x = 10,480.45

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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.