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Finding the Fourth Proportional to 18,998.70, 28,498.05 and 8,468.70

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Solution

The fourth proportional to 18,998.70, 28,498.05 and 8,468.70 is: 12,703.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.70 : 28,498.05 = 8,468.70 : x
  2. Step 2: Convert to fraction form
    18,998.70/28,498.05 = 8,468.70/x
  3. Step 3: Cross multiply
    18,998.70x = 28,498.05 × 8,468.70
  4. Step 4: Simplify right side
    18,998.70x = 241,341,436.04
  5. Step 5: Solve for x
    x = 241,341,436.04/18,998.70
  6. Step 6: Final answer
    x = 12,703.05

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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.