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Finding the Fourth Proportional to 18,981.74, 28,490.00 and 9,628.22

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Solution

The fourth proportional to 18,981.74, 28,490.00 and 9,628.22 is: 14,451.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.74 : 28,490.00 = 9,628.22 : x
  2. Step 2: Convert to fraction form
    18,981.74/28,490.00 = 9,628.22/x
  3. Step 3: Cross multiply
    18,981.74x = 28,490.00 × 9,628.22
  4. Step 4: Simplify right side
    18,981.74x = 274,308,010.88
  5. Step 5: Solve for x
    x = 274,308,010.88/18,981.74
  6. Step 6: Final answer
    x = 14,451.15

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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.