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Finding the Fourth Proportional to 19,668.97, 29,470.64 and 13,815.10

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Solution

The fourth proportional to 19,668.97, 29,470.64 and 13,815.10 is: 20,699.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,668.97 : 29,470.64 = 13,815.10 : x
  2. Step 2: Convert to fraction form
    19,668.97/29,470.64 = 13,815.10/x
  3. Step 3: Cross multiply
    19,668.97x = 29,470.64 × 13,815.10
  4. Step 4: Simplify right side
    19,668.97x = 407,139,769.59
  5. Step 5: Solve for x
    x = 407,139,769.59/19,668.97
  6. Step 6: Final answer
    x = 20,699.60

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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.