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Finding the Fourth Proportional to 18,625.80, 25,709.58 and 11,929.47

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Solution

The fourth proportional to 18,625.80, 25,709.58 and 11,929.47 is: 16,466.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,625.80 : 25,709.58 = 11,929.47 : x
  2. Step 2: Convert to fraction form
    18,625.80/25,709.58 = 11,929.47/x
  3. Step 3: Cross multiply
    18,625.80x = 25,709.58 × 11,929.47
  4. Step 4: Simplify right side
    18,625.80x = 306,701,663.32
  5. Step 5: Solve for x
    x = 306,701,663.32/18,625.80
  6. Step 6: Final answer
    x = 16,466.50

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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.