Home / 12,590.98-18,885.16-4,270.78

Finding the Fourth Proportional to 12,590.98, 18,885.16 and 4,270.78

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Solution

The fourth proportional to 12,590.98, 18,885.16 and 4,270.78 is: 6,405.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.98 : 18,885.16 = 4,270.78 : x
  2. Step 2: Convert to fraction form
    12,590.98/18,885.16 = 4,270.78/x
  3. Step 3: Cross multiply
    12,590.98x = 18,885.16 × 4,270.78
  4. Step 4: Simplify right side
    12,590.98x = 80,654,363.62
  5. Step 5: Solve for x
    x = 80,654,363.62/12,590.98
  6. Step 6: Final answer
    x = 6,405.73

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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.