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Finding the Fourth Proportional to 14,187.62, 19,578.76 and 7,814.09

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Solution

The fourth proportional to 14,187.62, 19,578.76 and 7,814.09 is: 10,783.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,187.62 : 19,578.76 = 7,814.09 : x
  2. Step 2: Convert to fraction form
    14,187.62/19,578.76 = 7,814.09/x
  3. Step 3: Cross multiply
    14,187.62x = 19,578.76 × 7,814.09
  4. Step 4: Simplify right side
    14,187.62x = 152,990,173.19
  5. Step 5: Solve for x
    x = 152,990,173.19/14,187.62
  6. Step 6: Final answer
    x = 10,783.36

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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.