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Finding the Fourth Proportional to 26,978.40, 40,467.60 and 21,401.55

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Solution

The fourth proportional to 26,978.40, 40,467.60 and 21,401.55 is: 32,102.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,978.40 : 40,467.60 = 21,401.55 : x
  2. Step 2: Convert to fraction form
    26,978.40/40,467.60 = 21,401.55/x
  3. Step 3: Cross multiply
    26,978.40x = 40,467.60 × 21,401.55
  4. Step 4: Simplify right side
    26,978.40x = 866,069,364.78
  5. Step 5: Solve for x
    x = 866,069,364.78/26,978.40
  6. Step 6: Final answer
    x = 32,102.33

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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.