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Finding the Fourth Proportional to 18,821, 25,973.52 and 10,438.04

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Solution

The fourth proportional to 18,821, 25,973.52 and 10,438.04 is: 14,404.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821 : 25,973.52 = 10,438.04 : x
  2. Step 2: Convert to fraction form
    18,821/25,973.52 = 10,438.04/x
  3. Step 3: Cross multiply
    18,821x = 25,973.52 × 10,438.04
  4. Step 4: Simplify right side
    18,821x = 271,112,640.70
  5. Step 5: Solve for x
    x = 271,112,640.70/18,821
  6. Step 6: Final answer
    x = 14,404.79

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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.