Home / 8,085,386.20-12,128,079.30-5,215,604.80

Finding the Fourth Proportional to 8,085,386.20, 12,128,079.30 and 5,215,604.80

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Solution

The fourth proportional to 8,085,386.20, 12,128,079.30 and 5,215,604.80 is: 7,823,407.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085,386.20 : 12,128,079.30 = 5,215,604.80 : x
  2. Step 2: Convert to fraction form
    8,085,386.20/12,128,079.30 = 5,215,604.80/x
  3. Step 3: Cross multiply
    8,085,386.20x = 12,128,079.30 × 5,215,604.80
  4. Step 4: Simplify right side
    8,085,386.20x = 63,255,268,611,860.64
  5. Step 5: Solve for x
    x = 63,255,268,611,860.64/8,085,386.20
  6. Step 6: Final answer
    x = 7,823,407.20

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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.