Home / 13,347.72-20,021.31-3,987.77

Finding the Fourth Proportional to 13,347.72, 20,021.31 and 3,987.77

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Solution

The fourth proportional to 13,347.72, 20,021.31 and 3,987.77 is: 5,981.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.72 : 20,021.31 = 3,987.77 : x
  2. Step 2: Convert to fraction form
    13,347.72/20,021.31 = 3,987.77/x
  3. Step 3: Cross multiply
    13,347.72x = 20,021.31 × 3,987.77
  4. Step 4: Simplify right side
    13,347.72x = 79,840,279.27
  5. Step 5: Solve for x
    x = 79,840,279.27/13,347.72
  6. Step 6: Final answer
    x = 5,981.57

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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.