Home / 20,715.55-28,388.26-18,722.59

Finding the Fourth Proportional to 20,715.55, 28,388.26 and 18,722.59

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Solution

The fourth proportional to 20,715.55, 28,388.26 and 18,722.59 is: 25,657.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.55 : 28,388.26 = 18,722.59 : x
  2. Step 2: Convert to fraction form
    20,715.55/28,388.26 = 18,722.59/x
  3. Step 3: Cross multiply
    20,715.55x = 28,388.26 × 18,722.59
  4. Step 4: Simplify right side
    20,715.55x = 531,501,752.79
  5. Step 5: Solve for x
    x = 531,501,752.79/20,715.55
  6. Step 6: Final answer
    x = 25,657.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.