Home / 21,919.34-32,878.68-20,518.45

Finding the Fourth Proportional to 21,919.34, 32,878.68 and 20,518.45

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Solution

The fourth proportional to 21,919.34, 32,878.68 and 20,518.45 is: 30,777.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.34 : 32,878.68 = 20,518.45 : x
  2. Step 2: Convert to fraction form
    21,919.34/32,878.68 = 20,518.45/x
  3. Step 3: Cross multiply
    21,919.34x = 32,878.68 × 20,518.45
  4. Step 4: Simplify right side
    21,919.34x = 674,619,392.51
  5. Step 5: Solve for x
    x = 674,619,392.51/21,919.34
  6. Step 6: Final answer
    x = 30,777.36

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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.