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Finding the Fourth Proportional to 8,697.69, 12,002.75 and 4,718.79

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Solution

The fourth proportional to 8,697.69, 12,002.75 and 4,718.79 is: 6,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.69 : 12,002.75 = 4,718.79 : x
  2. Step 2: Convert to fraction form
    8,697.69/12,002.75 = 4,718.79/x
  3. Step 3: Cross multiply
    8,697.69x = 12,002.75 × 4,718.79
  4. Step 4: Simplify right side
    8,697.69x = 56,638,433.08
  5. Step 5: Solve for x
    x = 56,638,433.08/8,697.69
  6. Step 6: Final answer
    x = 6,511.89

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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.