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Finding the Fourth Proportional to 18,889.29, 28,323.43 and 7,803.50

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Solution

The fourth proportional to 18,889.29, 28,323.43 and 7,803.50 is: 11,700.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.29 : 28,323.43 = 7,803.50 : x
  2. Step 2: Convert to fraction form
    18,889.29/28,323.43 = 7,803.50/x
  3. Step 3: Cross multiply
    18,889.29x = 28,323.43 × 7,803.50
  4. Step 4: Simplify right side
    18,889.29x = 221,021,724.88
  5. Step 5: Solve for x
    x = 221,021,724.88/18,889.29
  6. Step 6: Final answer
    x = 11,700.90

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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.