Home / 20,715.12-28,577.76-13,998.27

Finding the Fourth Proportional to 20,715.12, 28,577.76 and 13,998.27

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Solution

The fourth proportional to 20,715.12, 28,577.76 and 13,998.27 is: 19,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.12 : 28,577.76 = 13,998.27 : x
  2. Step 2: Convert to fraction form
    20,715.12/28,577.76 = 13,998.27/x
  3. Step 3: Cross multiply
    20,715.12x = 28,577.76 × 13,998.27
  4. Step 4: Simplify right side
    20,715.12x = 400,039,200.48
  5. Step 5: Solve for x
    x = 400,039,200.48/20,715.12
  6. Step 6: Final answer
    x = 19,311.46

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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.