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Finding the Fourth Proportional to 26,015.40, 38,907.90 and 21,868.20

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Solution

The fourth proportional to 26,015.40, 38,907.90 and 21,868.20 is: 32,705.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,015.40 : 38,907.90 = 21,868.20 : x
  2. Step 2: Convert to fraction form
    26,015.40/38,907.90 = 21,868.20/x
  3. Step 3: Cross multiply
    26,015.40x = 38,907.90 × 21,868.20
  4. Step 4: Simplify right side
    26,015.40x = 850,845,738.78
  5. Step 5: Solve for x
    x = 850,845,738.78/26,015.40
  6. Step 6: Final answer
    x = 32,705.46

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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.