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Finding the Fourth Proportional to 18,651.89, 25,739.53 and 10,154.50

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Solution

The fourth proportional to 18,651.89, 25,739.53 and 10,154.50 is: 14,013.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.89 : 25,739.53 = 10,154.50 : x
  2. Step 2: Convert to fraction form
    18,651.89/25,739.53 = 10,154.50/x
  3. Step 3: Cross multiply
    18,651.89x = 25,739.53 × 10,154.50
  4. Step 4: Simplify right side
    18,651.89x = 261,371,967.65
  5. Step 5: Solve for x
    x = 261,371,967.65/18,651.89
  6. Step 6: Final answer
    x = 14,013.16

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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.