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Finding the Fourth Proportional to 20,064.78, 27,689.78 and 12,006.72

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Solution

The fourth proportional to 20,064.78, 27,689.78 and 12,006.72 is: 16,569.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,064.78 : 27,689.78 = 12,006.72 : x
  2. Step 2: Convert to fraction form
    20,064.78/27,689.78 = 12,006.72/x
  3. Step 3: Cross multiply
    20,064.78x = 27,689.78 × 12,006.72
  4. Step 4: Simplify right side
    20,064.78x = 332,463,465.34
  5. Step 5: Solve for x
    x = 332,463,465.34/20,064.78
  6. Step 6: Final answer
    x = 16,569.50

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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.