Home / 28,387.01-39,144.38-21,205.67

Finding the Fourth Proportional to 28,387.01, 39,144.38 and 21,205.67

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Solution

The fourth proportional to 28,387.01, 39,144.38 and 21,205.67 is: 29,241.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.01 : 39,144.38 = 21,205.67 : x
  2. Step 2: Convert to fraction form
    28,387.01/39,144.38 = 21,205.67/x
  3. Step 3: Cross multiply
    28,387.01x = 39,144.38 × 21,205.67
  4. Step 4: Simplify right side
    28,387.01x = 830,082,502.88
  5. Step 5: Solve for x
    x = 830,082,502.88/28,387.01
  6. Step 6: Final answer
    x = 29,241.64

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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.