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Finding the Fourth Proportional to 25,669.76, 38,489.70 and 12,508.88

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Solution

The fourth proportional to 25,669.76, 38,489.70 and 12,508.88 is: 18,756.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,669.76 : 38,489.70 = 12,508.88 : x
  2. Step 2: Convert to fraction form
    25,669.76/38,489.70 = 12,508.88/x
  3. Step 3: Cross multiply
    25,669.76x = 38,489.70 × 12,508.88
  4. Step 4: Simplify right side
    25,669.76x = 481,463,038.54
  5. Step 5: Solve for x
    x = 481,463,038.54/25,669.76
  6. Step 6: Final answer
    x = 18,756.04

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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.