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Finding the Fourth Proportional to 18,007.95, 26,998.54 and 8,639.05

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Solution

The fourth proportional to 18,007.95, 26,998.54 and 8,639.05 is: 12,952.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.95 : 26,998.54 = 8,639.05 : x
  2. Step 2: Convert to fraction form
    18,007.95/26,998.54 = 8,639.05/x
  3. Step 3: Cross multiply
    18,007.95x = 26,998.54 × 8,639.05
  4. Step 4: Simplify right side
    18,007.95x = 233,241,646.88
  5. Step 5: Solve for x
    x = 233,241,646.88/18,007.95
  6. Step 6: Final answer
    x = 12,952.15

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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.