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Finding the Fourth Proportional to 8,312.88, 12,388.30 and 8,072.98

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Solution

The fourth proportional to 8,312.88, 12,388.30 and 8,072.98 is: 12,030.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.88 : 12,388.30 = 8,072.98 : x
  2. Step 2: Convert to fraction form
    8,312.88/12,388.30 = 8,072.98/x
  3. Step 3: Cross multiply
    8,312.88x = 12,388.30 × 8,072.98
  4. Step 4: Simplify right side
    8,312.88x = 100,010,498.13
  5. Step 5: Solve for x
    x = 100,010,498.13/8,312.88
  6. Step 6: Final answer
    x = 12,030.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.