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Finding the Fourth Proportional to 25,689.63, 38,534.44 and 7,221.63

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Solution

The fourth proportional to 25,689.63, 38,534.44 and 7,221.63 is: 10,832.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,689.63 : 38,534.44 = 7,221.63 : x
  2. Step 2: Convert to fraction form
    25,689.63/38,534.44 = 7,221.63/x
  3. Step 3: Cross multiply
    25,689.63x = 38,534.44 × 7,221.63
  4. Step 4: Simplify right side
    25,689.63x = 278,281,467.94
  5. Step 5: Solve for x
    x = 278,281,467.94/25,689.63
  6. Step 6: Final answer
    x = 10,832.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.