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Finding the Fourth Proportional to 18,862.84, 28,299.07 and 8,865.65

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Solution

The fourth proportional to 18,862.84, 28,299.07 and 8,865.65 is: 13,300.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,862.84 : 28,299.07 = 8,865.65 : x
  2. Step 2: Convert to fraction form
    18,862.84/28,299.07 = 8,865.65/x
  3. Step 3: Cross multiply
    18,862.84x = 28,299.07 × 8,865.65
  4. Step 4: Simplify right side
    18,862.84x = 250,889,649.95
  5. Step 5: Solve for x
    x = 250,889,649.95/18,862.84
  6. Step 6: Final answer
    x = 13,300.74

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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.