Home / 28,421.22-39,224.06-21,238.67

Finding the Fourth Proportional to 28,421.22, 39,224.06 and 21,238.67

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Solution

The fourth proportional to 28,421.22, 39,224.06 and 21,238.67 is: 29,311.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.22 : 39,224.06 = 21,238.67 : x
  2. Step 2: Convert to fraction form
    28,421.22/39,224.06 = 21,238.67/x
  3. Step 3: Cross multiply
    28,421.22x = 39,224.06 × 21,238.67
  4. Step 4: Simplify right side
    28,421.22x = 833,066,745.86
  5. Step 5: Solve for x
    x = 833,066,745.86/28,421.22
  6. Step 6: Final answer
    x = 29,311.43

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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.