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Finding the Fourth Proportional to 18,865, 26,026.20 and 13,198.24

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Solution

The fourth proportional to 18,865, 26,026.20 and 13,198.24 is: 18,208.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865 : 26,026.20 = 13,198.24 : x
  2. Step 2: Convert to fraction form
    18,865/26,026.20 = 13,198.24/x
  3. Step 3: Cross multiply
    18,865x = 26,026.20 × 13,198.24
  4. Step 4: Simplify right side
    18,865x = 343,500,033.89
  5. Step 5: Solve for x
    x = 343,500,033.89/18,865
  6. Step 6: Final answer
    x = 18,208.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.