Home / 20,715.23-28,577.91-13,998.41

Finding the Fourth Proportional to 20,715.23, 28,577.91 and 13,998.41

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Solution

The fourth proportional to 20,715.23, 28,577.91 and 13,998.41 is: 19,311.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.23 : 28,577.91 = 13,998.41 : x
  2. Step 2: Convert to fraction form
    20,715.23/28,577.91 = 13,998.41/x
  3. Step 3: Cross multiply
    20,715.23x = 28,577.91 × 13,998.41
  4. Step 4: Simplify right side
    20,715.23x = 400,045,301.12
  5. Step 5: Solve for x
    x = 400,045,301.12/20,715.23
  6. Step 6: Final answer
    x = 19,311.65

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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.