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Finding the Fourth Proportional to 6,813.12, 9,390.15 and 6,623.58

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Solution

The fourth proportional to 6,813.12, 9,390.15 and 6,623.58 is: 9,128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,813.12 : 9,390.15 = 6,623.58 : x
  2. Step 2: Convert to fraction form
    6,813.12/9,390.15 = 6,623.58/x
  3. Step 3: Cross multiply
    6,813.12x = 9,390.15 × 6,623.58
  4. Step 4: Simplify right side
    6,813.12x = 62,196,409.74
  5. Step 5: Solve for x
    x = 62,196,409.74/6,813.12
  6. Step 6: Final answer
    x = 9,128.92

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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.