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Finding the Fourth Proportional to 20,960.70, 28,926.51 and 12,006.32

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Solution

The fourth proportional to 20,960.70, 28,926.51 and 12,006.32 is: 16,569.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.70 : 28,926.51 = 12,006.32 : x
  2. Step 2: Convert to fraction form
    20,960.70/28,926.51 = 12,006.32/x
  3. Step 3: Cross multiply
    20,960.70x = 28,926.51 × 12,006.32
  4. Step 4: Simplify right side
    20,960.70x = 347,300,790.91
  5. Step 5: Solve for x
    x = 347,300,790.91/20,960.70
  6. Step 6: Final answer
    x = 16,569.14

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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.