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Finding the Fourth Proportional to 26,946.80, 40,420.20 and 21,309.20

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Solution

The fourth proportional to 26,946.80, 40,420.20 and 21,309.20 is: 31,963.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,946.80 : 40,420.20 = 21,309.20 : x
  2. Step 2: Convert to fraction form
    26,946.80/40,420.20 = 21,309.20/x
  3. Step 3: Cross multiply
    26,946.80x = 40,420.20 × 21,309.20
  4. Step 4: Simplify right side
    26,946.80x = 861,322,125.84
  5. Step 5: Solve for x
    x = 861,322,125.84/26,946.80
  6. Step 6: Final answer
    x = 31,963.80

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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.