Home / 28,261.92-42,392.88-20,519.94

Finding the Fourth Proportional to 28,261.92, 42,392.88 and 20,519.94

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Solution

The fourth proportional to 28,261.92, 42,392.88 and 20,519.94 is: 30,779.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.92 : 42,392.88 = 20,519.94 : x
  2. Step 2: Convert to fraction form
    28,261.92/42,392.88 = 20,519.94/x
  3. Step 3: Cross multiply
    28,261.92x = 42,392.88 × 20,519.94
  4. Step 4: Simplify right side
    28,261.92x = 869,899,354.03
  5. Step 5: Solve for x
    x = 869,899,354.03/28,261.92
  6. Step 6: Final answer
    x = 30,779.91

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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.