Home / 12,590.84-18,878.98-5,186.92

Finding the Fourth Proportional to 12,590.84, 18,878.98 and 5,186.92

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Solution

The fourth proportional to 12,590.84, 18,878.98 and 5,186.92 is: 7,777.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.84 : 18,878.98 = 5,186.92 : x
  2. Step 2: Convert to fraction form
    12,590.84/18,878.98 = 5,186.92/x
  3. Step 3: Cross multiply
    12,590.84x = 18,878.98 × 5,186.92
  4. Step 4: Simplify right side
    12,590.84x = 97,923,758.94
  5. Step 5: Solve for x
    x = 97,923,758.94/12,590.84
  6. Step 6: Final answer
    x = 7,777.38

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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.