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Finding the Fourth Proportional to 18,683.81, 25,769.07 and 11,970.06

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Solution

The fourth proportional to 18,683.81, 25,769.07 and 11,970.06 is: 16,509.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.81 : 25,769.07 = 11,970.06 : x
  2. Step 2: Convert to fraction form
    18,683.81/25,769.07 = 11,970.06/x
  3. Step 3: Cross multiply
    18,683.81x = 25,769.07 × 11,970.06
  4. Step 4: Simplify right side
    18,683.81x = 308,457,125.35
  5. Step 5: Solve for x
    x = 308,457,125.35/18,683.81
  6. Step 6: Final answer
    x = 16,509.33

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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.