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Finding the Fourth Proportional to 20,674, 28,532.23 and 12,178.79

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Solution

The fourth proportional to 20,674, 28,532.23 and 12,178.79 is: 16,807.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,674 : 28,532.23 = 12,178.79 : x
  2. Step 2: Convert to fraction form
    20,674/28,532.23 = 12,178.79/x
  3. Step 3: Cross multiply
    20,674x = 28,532.23 × 12,178.79
  4. Step 4: Simplify right side
    20,674x = 347,488,037.40
  5. Step 5: Solve for x
    x = 347,488,037.40/20,674
  6. Step 6: Final answer
    x = 16,807.97

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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.