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Finding the Fourth Proportional to 18,210, 25,129.73 and 10,143.75

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Solution

The fourth proportional to 18,210, 25,129.73 and 10,143.75 is: 13,998.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,210 : 25,129.73 = 10,143.75 : x
  2. Step 2: Convert to fraction form
    18,210/25,129.73 = 10,143.75/x
  3. Step 3: Cross multiply
    18,210x = 25,129.73 × 10,143.75
  4. Step 4: Simplify right side
    18,210x = 254,909,724.05
  5. Step 5: Solve for x
    x = 254,909,724.05/18,210
  6. Step 6: Final answer
    x = 13,998.34

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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.