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Finding the Fourth Proportional to 18,911.68, 28,362.30 and 10,014.94

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Solution

The fourth proportional to 18,911.68, 28,362.30 and 10,014.94 is: 15,019.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.68 : 28,362.30 = 10,014.94 : x
  2. Step 2: Convert to fraction form
    18,911.68/28,362.30 = 10,014.94/x
  3. Step 3: Cross multiply
    18,911.68x = 28,362.30 × 10,014.94
  4. Step 4: Simplify right side
    18,911.68x = 284,046,732.76
  5. Step 5: Solve for x
    x = 284,046,732.76/18,911.68
  6. Step 6: Final answer
    x = 15,019.65

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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.