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Finding the Fourth Proportional to 8,295.30, 12,428.55 and 6,999.30

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Solution

The fourth proportional to 8,295.30, 12,428.55 and 6,999.30 is: 10,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,295.30 : 12,428.55 = 6,999.30 : x
  2. Step 2: Convert to fraction form
    8,295.30/12,428.55 = 6,999.30/x
  3. Step 3: Cross multiply
    8,295.30x = 12,428.55 × 6,999.30
  4. Step 4: Simplify right side
    8,295.30x = 86,991,150.02
  5. Step 5: Solve for x
    x = 86,991,150.02/8,295.30
  6. Step 6: Final answer
    x = 10,486.80

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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.