Home / 12,879,009.40-19,318,514.10-7,777,175.80

Finding the Fourth Proportional to 12,879,009.40, 19,318,514.10 and 7,777,175.80

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Solution

The fourth proportional to 12,879,009.40, 19,318,514.10 and 7,777,175.80 is: 11,665,763.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879,009.40 : 19,318,514.10 = 7,777,175.80 : x
  2. Step 2: Convert to fraction form
    12,879,009.40/19,318,514.10 = 7,777,175.80/x
  3. Step 3: Cross multiply
    12,879,009.40x = 19,318,514.10 × 7,777,175.80
  4. Step 4: Simplify right side
    12,879,009.40x = 150,243,480,350,478.78
  5. Step 5: Solve for x
    x = 150,243,480,350,478.78/12,879,009.40
  6. Step 6: Final answer
    x = 11,665,763.70

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Similar ratio
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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.