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Finding the Fourth Proportional to 18,804.65, 25,951.25 and 10,421.15

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Solution

The fourth proportional to 18,804.65, 25,951.25 and 10,421.15 is: 14,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.65 : 25,951.25 = 10,421.15 : x
  2. Step 2: Convert to fraction form
    18,804.65/25,951.25 = 10,421.15/x
  3. Step 3: Cross multiply
    18,804.65x = 25,951.25 × 10,421.15
  4. Step 4: Simplify right side
    18,804.65x = 270,441,765.23
  5. Step 5: Solve for x
    x = 270,441,765.23/18,804.65
  6. Step 6: Final answer
    x = 14,381.65

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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.