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Finding the Fourth Proportional to 23,978.81, 35,990.37 and 12,140.89

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Solution

The fourth proportional to 23,978.81, 35,990.37 and 12,140.89 is: 18,222.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,978.81 : 35,990.37 = 12,140.89 : x
  2. Step 2: Convert to fraction form
    23,978.81/35,990.37 = 12,140.89/x
  3. Step 3: Cross multiply
    23,978.81x = 35,990.37 × 12,140.89
  4. Step 4: Simplify right side
    23,978.81x = 436,955,122.69
  5. Step 5: Solve for x
    x = 436,955,122.69/23,978.81
  6. Step 6: Final answer
    x = 18,222.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.