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Finding the Fourth Proportional to 26,839.20, 40,258.80 and 16,989.60

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Solution

The fourth proportional to 26,839.20, 40,258.80 and 16,989.60 is: 25,484.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,839.20 : 40,258.80 = 16,989.60 : x
  2. Step 2: Convert to fraction form
    26,839.20/40,258.80 = 16,989.60/x
  3. Step 3: Cross multiply
    26,839.20x = 40,258.80 × 16,989.60
  4. Step 4: Simplify right side
    26,839.20x = 683,980,908.48
  5. Step 5: Solve for x
    x = 683,980,908.48/26,839.20
  6. Step 6: Final answer
    x = 25,484.40

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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.