Home / 18,406.05-25,374.83-12,428.25

Finding the Fourth Proportional to 18,406.05, 25,374.83 and 12,428.25

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Solution

The fourth proportional to 18,406.05, 25,374.83 and 12,428.25 is: 17,133.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,406.05 : 25,374.83 = 12,428.25 : x
  2. Step 2: Convert to fraction form
    18,406.05/25,374.83 = 12,428.25/x
  3. Step 3: Cross multiply
    18,406.05x = 25,374.83 × 12,428.25
  4. Step 4: Simplify right side
    18,406.05x = 315,364,730.95
  5. Step 5: Solve for x
    x = 315,364,730.95/18,406.05
  6. Step 6: Final answer
    x = 17,133.75

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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.