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Finding the Fourth Proportional to 26,648.63, 39,929.20 and 9,108.89

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Solution

The fourth proportional to 26,648.63, 39,929.20 and 9,108.89 is: 13,648.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,648.63 : 39,929.20 = 9,108.89 : x
  2. Step 2: Convert to fraction form
    26,648.63/39,929.20 = 9,108.89/x
  3. Step 3: Cross multiply
    26,648.63x = 39,929.20 × 9,108.89
  4. Step 4: Simplify right side
    26,648.63x = 363,710,669.14
  5. Step 5: Solve for x
    x = 363,710,669.14/26,648.63
  6. Step 6: Final answer
    x = 13,648.38

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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.