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Finding the Fourth Proportional to 9,315.70, 12,841.09 and 6,326.30

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Solution

The fourth proportional to 9,315.70, 12,841.09 and 6,326.30 is: 8,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315.70 : 12,841.09 = 6,326.30 : x
  2. Step 2: Convert to fraction form
    9,315.70/12,841.09 = 6,326.30/x
  3. Step 3: Cross multiply
    9,315.70x = 12,841.09 × 6,326.30
  4. Step 4: Simplify right side
    9,315.70x = 81,236,603.95
  5. Step 5: Solve for x
    x = 81,236,603.95/9,315.70
  6. Step 6: Final answer
    x = 8,720.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.