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Finding the Fourth Proportional to 7,999.70, 12,012.15 and 4,715.30

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Solution

The fourth proportional to 7,999.70, 12,012.15 and 4,715.30 is: 7,080.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.70 : 12,012.15 = 4,715.30 : x
  2. Step 2: Convert to fraction form
    7,999.70/12,012.15 = 4,715.30/x
  3. Step 3: Cross multiply
    7,999.70x = 12,012.15 × 4,715.30
  4. Step 4: Simplify right side
    7,999.70x = 56,640,890.90
  5. Step 5: Solve for x
    x = 56,640,890.90/7,999.70
  6. Step 6: Final answer
    x = 7,080.38

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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.