Home / 20,010.78-30,021.50-16,660.89

Finding the Fourth Proportional to 20,010.78, 30,021.50 and 16,660.89

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Solution

The fourth proportional to 20,010.78, 30,021.50 and 16,660.89 is: 24,995.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,010.78 : 30,021.50 = 16,660.89 : x
  2. Step 2: Convert to fraction form
    20,010.78/30,021.50 = 16,660.89/x
  3. Step 3: Cross multiply
    20,010.78x = 30,021.50 × 16,660.89
  4. Step 4: Simplify right side
    20,010.78x = 500,184,950.79
  5. Step 5: Solve for x
    x = 500,184,950.79/20,010.78
  6. Step 6: Final answer
    x = 24,995.77

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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.