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Finding the Fourth Proportional to 26,938.80, 40,408.20 and 7,220.40

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Solution

The fourth proportional to 26,938.80, 40,408.20 and 7,220.40 is: 10,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,938.80 : 40,408.20 = 7,220.40 : x
  2. Step 2: Convert to fraction form
    26,938.80/40,408.20 = 7,220.40/x
  3. Step 3: Cross multiply
    26,938.80x = 40,408.20 × 7,220.40
  4. Step 4: Simplify right side
    26,938.80x = 291,763,367.28
  5. Step 5: Solve for x
    x = 291,763,367.28/26,938.80
  6. Step 6: Final answer
    x = 10,830.60

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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.