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Finding the Fourth Proportional to 18,123.75, 25,015.10 and 11,056.10

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Solution

The fourth proportional to 18,123.75, 25,015.10 and 11,056.10 is: 15,260.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.75 : 25,015.10 = 11,056.10 : x
  2. Step 2: Convert to fraction form
    18,123.75/25,015.10 = 11,056.10/x
  3. Step 3: Cross multiply
    18,123.75x = 25,015.10 × 11,056.10
  4. Step 4: Simplify right side
    18,123.75x = 276,569,266.75
  5. Step 5: Solve for x
    x = 276,569,266.75/18,123.75
  6. Step 6: Final answer
    x = 15,260.05

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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.