Home / 28,590.40-42,885.60-7,813.90

Finding the Fourth Proportional to 28,590.40, 42,885.60 and 7,813.90

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Solution

The fourth proportional to 28,590.40, 42,885.60 and 7,813.90 is: 11,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,590.40 : 42,885.60 = 7,813.90 : x
  2. Step 2: Convert to fraction form
    28,590.40/42,885.60 = 7,813.90/x
  3. Step 3: Cross multiply
    28,590.40x = 42,885.60 × 7,813.90
  4. Step 4: Simplify right side
    28,590.40x = 335,103,789.84
  5. Step 5: Solve for x
    x = 335,103,789.84/28,590.40
  6. Step 6: Final answer
    x = 11,720.85

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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.