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Finding the Fourth Proportional to 26,438.50, 36,485.13 and 15,260.50

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Solution

The fourth proportional to 26,438.50, 36,485.13 and 15,260.50 is: 21,059.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,438.50 : 36,485.13 = 15,260.50 : x
  2. Step 2: Convert to fraction form
    26,438.50/36,485.13 = 15,260.50/x
  3. Step 3: Cross multiply
    26,438.50x = 36,485.13 × 15,260.50
  4. Step 4: Simplify right side
    26,438.50x = 556,781,326.37
  5. Step 5: Solve for x
    x = 556,781,326.37/26,438.50
  6. Step 6: Final answer
    x = 21,059.49

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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.