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Finding the Fourth Proportional to 12,668.16, 18,985.71 and 6,817.89

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Solution

The fourth proportional to 12,668.16, 18,985.71 and 6,817.89 is: 10,217.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.16 : 18,985.71 = 6,817.89 : x
  2. Step 2: Convert to fraction form
    12,668.16/18,985.71 = 6,817.89/x
  3. Step 3: Cross multiply
    12,668.16x = 18,985.71 × 6,817.89
  4. Step 4: Simplify right side
    12,668.16x = 129,442,482.35
  5. Step 5: Solve for x
    x = 129,442,482.35/12,668.16
  6. Step 6: Final answer
    x = 10,217.94

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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.