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Finding the Fourth Proportional to 8,640.63, 12,960.88 and 7,467.05

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Solution

The fourth proportional to 8,640.63, 12,960.88 and 7,467.05 is: 11,200.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.63 : 12,960.88 = 7,467.05 : x
  2. Step 2: Convert to fraction form
    8,640.63/12,960.88 = 7,467.05/x
  3. Step 3: Cross multiply
    8,640.63x = 12,960.88 × 7,467.05
  4. Step 4: Simplify right side
    8,640.63x = 96,779,552.74
  5. Step 5: Solve for x
    x = 96,779,552.74/8,640.63
  6. Step 6: Final answer
    x = 11,200.52

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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.