Home / 28,197.25-38,912.58-18,128.99

Finding the Fourth Proportional to 28,197.25, 38,912.58 and 18,128.99

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Solution

The fourth proportional to 28,197.25, 38,912.58 and 18,128.99 is: 25,018.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,197.25 : 38,912.58 = 18,128.99 : x
  2. Step 2: Convert to fraction form
    28,197.25/38,912.58 = 18,128.99/x
  3. Step 3: Cross multiply
    28,197.25x = 38,912.58 × 18,128.99
  4. Step 4: Simplify right side
    28,197.25x = 705,445,870.98
  5. Step 5: Solve for x
    x = 705,445,870.98/28,197.25
  6. Step 6: Final answer
    x = 25,018.25

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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.