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Finding the Fourth Proportional to 20,866.98, 28,794.63 and 12,366.84

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Solution

The fourth proportional to 20,866.98, 28,794.63 and 12,366.84 is: 17,065.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.98 : 28,794.63 = 12,366.84 : x
  2. Step 2: Convert to fraction form
    20,866.98/28,794.63 = 12,366.84/x
  3. Step 3: Cross multiply
    20,866.98x = 28,794.63 × 12,366.84
  4. Step 4: Simplify right side
    20,866.98x = 356,098,582.07
  5. Step 5: Solve for x
    x = 356,098,582.07/20,866.98
  6. Step 6: Final answer
    x = 17,065.17

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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.