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Finding the Fourth Proportional to 18,914.68, 28,371.99 and 18,887.32

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Solution

The fourth proportional to 18,914.68, 28,371.99 and 18,887.32 is: 28,330.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914.68 : 28,371.99 = 18,887.32 : x
  2. Step 2: Convert to fraction form
    18,914.68/28,371.99 = 18,887.32/x
  3. Step 3: Cross multiply
    18,914.68x = 28,371.99 × 18,887.32
  4. Step 4: Simplify right side
    18,914.68x = 535,870,854.17
  5. Step 5: Solve for x
    x = 535,870,854.17/18,914.68
  6. Step 6: Final answer
    x = 28,330.95

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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.