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Finding the Fourth Proportional to 18,721.50, 25,835.67 and 12,097.50

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Solution

The fourth proportional to 18,721.50, 25,835.67 and 12,097.50 is: 16,694.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.50 : 25,835.67 = 12,097.50 : x
  2. Step 2: Convert to fraction form
    18,721.50/25,835.67 = 12,097.50/x
  3. Step 3: Cross multiply
    18,721.50x = 25,835.67 × 12,097.50
  4. Step 4: Simplify right side
    18,721.50x = 312,547,017.83
  5. Step 5: Solve for x
    x = 312,547,017.83/18,721.50
  6. Step 6: Final answer
    x = 16,694.55

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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.