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Finding the Fourth Proportional to 14,005.71, 21,008.97 and 6,613.65

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Solution

The fourth proportional to 14,005.71, 21,008.97 and 6,613.65 is: 9,920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.71 : 21,008.97 = 6,613.65 : x
  2. Step 2: Convert to fraction form
    14,005.71/21,008.97 = 6,613.65/x
  3. Step 3: Cross multiply
    14,005.71x = 21,008.97 × 6,613.65
  4. Step 4: Simplify right side
    14,005.71x = 138,945,974.44
  5. Step 5: Solve for x
    x = 138,945,974.44/14,005.71
  6. Step 6: Final answer
    x = 9,920.67

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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.