Home / 18,905.81-28,344.80-6,422.48

Finding the Fourth Proportional to 18,905.81, 28,344.80 and 6,422.48

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Solution

The fourth proportional to 18,905.81, 28,344.80 and 6,422.48 is: 9,628.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.81 : 28,344.80 = 6,422.48 : x
  2. Step 2: Convert to fraction form
    18,905.81/28,344.80 = 6,422.48/x
  3. Step 3: Cross multiply
    18,905.81x = 28,344.80 × 6,422.48
  4. Step 4: Simplify right side
    18,905.81x = 182,043,737.27
  5. Step 5: Solve for x
    x = 182,043,737.27/18,905.81
  6. Step 6: Final answer
    x = 9,628.99

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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.