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Finding the Fourth Proportional to 18,683.94, 25,769.26 and 11,970.20

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Solution

The fourth proportional to 18,683.94, 25,769.26 and 11,970.20 is: 16,509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.94 : 25,769.26 = 11,970.20 : x
  2. Step 2: Convert to fraction form
    18,683.94/25,769.26 = 11,970.20/x
  3. Step 3: Cross multiply
    18,683.94x = 25,769.26 × 11,970.20
  4. Step 4: Simplify right side
    18,683.94x = 308,463,082.17
  5. Step 5: Solve for x
    x = 308,463,082.17/18,683.94
  6. Step 6: Final answer
    x = 16,509.53

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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.