Home / 20,403.28-28,163.55-12,862.32

Finding the Fourth Proportional to 20,403.28, 28,163.55 and 12,862.32

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Solution

The fourth proportional to 20,403.28, 28,163.55 and 12,862.32 is: 17,754.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.28 : 28,163.55 = 12,862.32 : x
  2. Step 2: Convert to fraction form
    20,403.28/28,163.55 = 12,862.32/x
  3. Step 3: Cross multiply
    20,403.28x = 28,163.55 × 12,862.32
  4. Step 4: Simplify right side
    20,403.28x = 362,248,592.44
  5. Step 5: Solve for x
    x = 362,248,592.44/20,403.28
  6. Step 6: Final answer
    x = 17,754.43

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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.