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Finding the Fourth Proportional to 12,555.69, 18,842.68 and 10,119.92

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Solution

The fourth proportional to 12,555.69, 18,842.68 and 10,119.92 is: 15,187.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.69 : 18,842.68 = 10,119.92 : x
  2. Step 2: Convert to fraction form
    12,555.69/18,842.68 = 10,119.92/x
  3. Step 3: Cross multiply
    12,555.69x = 18,842.68 × 10,119.92
  4. Step 4: Simplify right side
    12,555.69x = 190,686,414.19
  5. Step 5: Solve for x
    x = 190,686,414.19/12,555.69
  6. Step 6: Final answer
    x = 15,187.25

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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.