Home / 21,886.68-30,130.60-20,882.40

Finding the Fourth Proportional to 21,886.68, 30,130.60 and 20,882.40

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Solution

The fourth proportional to 21,886.68, 30,130.60 and 20,882.40 is: 28,748.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.68 : 30,130.60 = 20,882.40 : x
  2. Step 2: Convert to fraction form
    21,886.68/30,130.60 = 20,882.40/x
  3. Step 3: Cross multiply
    21,886.68x = 30,130.60 × 20,882.40
  4. Step 4: Simplify right side
    21,886.68x = 629,199,241.44
  5. Step 5: Solve for x
    x = 629,199,241.44/21,886.68
  6. Step 6: Final answer
    x = 28,748.04

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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.