Home / 20,619.48-30,860.76-18,774.84

Finding the Fourth Proportional to 20,619.48, 30,860.76 and 18,774.84

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Solution

The fourth proportional to 20,619.48, 30,860.76 and 18,774.84 is: 28,099.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.48 : 30,860.76 = 18,774.84 : x
  2. Step 2: Convert to fraction form
    20,619.48/30,860.76 = 18,774.84/x
  3. Step 3: Cross multiply
    20,619.48x = 30,860.76 × 18,774.84
  4. Step 4: Simplify right side
    20,619.48x = 579,405,831.28
  5. Step 5: Solve for x
    x = 579,405,831.28/20,619.48
  6. Step 6: Final answer
    x = 28,099.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.