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Finding the Fourth Proportional to 18,280.78, 25,227.93 and 11,211.10

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Solution

The fourth proportional to 18,280.78, 25,227.93 and 11,211.10 is: 15,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,280.78 : 25,227.93 = 11,211.10 : x
  2. Step 2: Convert to fraction form
    18,280.78/25,227.93 = 11,211.10/x
  3. Step 3: Cross multiply
    18,280.78x = 25,227.93 × 11,211.10
  4. Step 4: Simplify right side
    18,280.78x = 282,832,824.99
  5. Step 5: Solve for x
    x = 282,832,824.99/18,280.78
  6. Step 6: Final answer
    x = 15,471.60

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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.