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Finding the Fourth Proportional to 18,959.90, 28,444.54 and 8,568.86

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Solution

The fourth proportional to 18,959.90, 28,444.54 and 8,568.86 is: 12,855.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.90 : 28,444.54 = 8,568.86 : x
  2. Step 2: Convert to fraction form
    18,959.90/28,444.54 = 8,568.86/x
  3. Step 3: Cross multiply
    18,959.90x = 28,444.54 × 8,568.86
  4. Step 4: Simplify right side
    18,959.90x = 243,737,281.02
  5. Step 5: Solve for x
    x = 243,737,281.02/18,959.90
  6. Step 6: Final answer
    x = 12,855.41

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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.