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Finding the Fourth Proportional to 18,709.26, 28,068.76 and 9,348.90

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Solution

The fourth proportional to 18,709.26, 28,068.76 and 9,348.90 is: 14,025.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.26 : 28,068.76 = 9,348.90 : x
  2. Step 2: Convert to fraction form
    18,709.26/28,068.76 = 9,348.90/x
  3. Step 3: Cross multiply
    18,709.26x = 28,068.76 × 9,348.90
  4. Step 4: Simplify right side
    18,709.26x = 262,412,030.36
  5. Step 5: Solve for x
    x = 262,412,030.36/18,709.26
  6. Step 6: Final answer
    x = 14,025.78

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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.