Home / 28,542.20-42,813.30-18,519.80

Finding the Fourth Proportional to 28,542.20, 42,813.30 and 18,519.80

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Solution

The fourth proportional to 28,542.20, 42,813.30 and 18,519.80 is: 27,779.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,542.20 : 42,813.30 = 18,519.80 : x
  2. Step 2: Convert to fraction form
    28,542.20/42,813.30 = 18,519.80/x
  3. Step 3: Cross multiply
    28,542.20x = 42,813.30 × 18,519.80
  4. Step 4: Simplify right side
    28,542.20x = 792,893,753.34
  5. Step 5: Solve for x
    x = 792,893,753.34/28,542.20
  6. Step 6: Final answer
    x = 27,779.70

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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.