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Finding the Fourth Proportional to 18,700, 25,806.32 and 12,087.52

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Solution

The fourth proportional to 18,700, 25,806.32 and 12,087.52 is: 16,680.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700 : 25,806.32 = 12,087.52 : x
  2. Step 2: Convert to fraction form
    18,700/25,806.32 = 12,087.52/x
  3. Step 3: Cross multiply
    18,700x = 25,806.32 × 12,087.52
  4. Step 4: Simplify right side
    18,700x = 311,934,409.13
  5. Step 5: Solve for x
    x = 311,934,409.13/18,700
  6. Step 6: Final answer
    x = 16,680.98

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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.