Home / 28,316.30-39,082.14-21,589.90

Finding the Fourth Proportional to 28,316.30, 39,082.14 and 21,589.90

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Solution

The fourth proportional to 28,316.30, 39,082.14 and 21,589.90 is: 29,798.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.30 : 39,082.14 = 21,589.90 : x
  2. Step 2: Convert to fraction form
    28,316.30/39,082.14 = 21,589.90/x
  3. Step 3: Cross multiply
    28,316.30x = 39,082.14 × 21,589.90
  4. Step 4: Simplify right side
    28,316.30x = 843,779,396.68
  5. Step 5: Solve for x
    x = 843,779,396.68/28,316.30
  6. Step 6: Final answer
    x = 29,798.37

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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.