Home / 29,021.78-40,051.68-21,838.77

Finding the Fourth Proportional to 29,021.78, 40,051.68 and 21,838.77

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Solution

The fourth proportional to 29,021.78, 40,051.68 and 21,838.77 is: 30,138.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,021.78 : 40,051.68 = 21,838.77 : x
  2. Step 2: Convert to fraction form
    29,021.78/40,051.68 = 21,838.77/x
  3. Step 3: Cross multiply
    29,021.78x = 40,051.68 × 21,838.77
  4. Step 4: Simplify right side
    29,021.78x = 874,679,404.61
  5. Step 5: Solve for x
    x = 874,679,404.61/29,021.78
  6. Step 6: Final answer
    x = 30,138.72

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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.