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Finding the Fourth Proportional to 8,699.62, 12,005.36 and 4,720.70

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Solution

The fourth proportional to 8,699.62, 12,005.36 and 4,720.70 is: 6,514.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.62 : 12,005.36 = 4,720.70 : x
  2. Step 2: Convert to fraction form
    8,699.62/12,005.36 = 4,720.70/x
  3. Step 3: Cross multiply
    8,699.62x = 12,005.36 × 4,720.70
  4. Step 4: Simplify right side
    8,699.62x = 56,673,744.77
  5. Step 5: Solve for x
    x = 56,673,744.77/8,699.62
  6. Step 6: Final answer
    x = 6,514.51

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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.