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Finding the Fourth Proportional to 8,699.88, 12,005.80 and 4,720.96

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Solution

The fourth proportional to 8,699.88, 12,005.80 and 4,720.96 is: 6,514.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.88 : 12,005.80 = 4,720.96 : x
  2. Step 2: Convert to fraction form
    8,699.88/12,005.80 = 4,720.96/x
  3. Step 3: Cross multiply
    8,699.88x = 12,005.80 × 4,720.96
  4. Step 4: Simplify right side
    8,699.88x = 56,678,901.57
  5. Step 5: Solve for x
    x = 56,678,901.57/8,699.88
  6. Step 6: Final answer
    x = 6,514.91

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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.