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Finding the Fourth Proportional to 18,763.88, 28,108.76 and 14,089.37

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Solution

The fourth proportional to 18,763.88, 28,108.76 and 14,089.37 is: 21,106.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.88 : 28,108.76 = 14,089.37 : x
  2. Step 2: Convert to fraction form
    18,763.88/28,108.76 = 14,089.37/x
  3. Step 3: Cross multiply
    18,763.88x = 28,108.76 × 14,089.37
  4. Step 4: Simplify right side
    18,763.88x = 396,034,508.89
  5. Step 5: Solve for x
    x = 396,034,508.89/18,763.88
  6. Step 6: Final answer
    x = 21,106.22

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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.