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Finding the Fourth Proportional to 26,420.54, 39,636.88 and 8,889.90

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Solution

The fourth proportional to 26,420.54, 39,636.88 and 8,889.90 is: 13,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,420.54 : 39,636.88 = 8,889.90 : x
  2. Step 2: Convert to fraction form
    26,420.54/39,636.88 = 8,889.90/x
  3. Step 3: Cross multiply
    26,420.54x = 39,636.88 × 8,889.90
  4. Step 4: Simplify right side
    26,420.54x = 352,367,899.51
  5. Step 5: Solve for x
    x = 352,367,899.51/26,420.54
  6. Step 6: Final answer
    x = 13,336.89

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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.