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Finding the Fourth Proportional to 18,887.31, 28,299.51 and 13,331.52

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Solution

The fourth proportional to 18,887.31, 28,299.51 and 13,331.52 is: 19,975.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.31 : 28,299.51 = 13,331.52 : x
  2. Step 2: Convert to fraction form
    18,887.31/28,299.51 = 13,331.52/x
  3. Step 3: Cross multiply
    18,887.31x = 28,299.51 × 13,331.52
  4. Step 4: Simplify right side
    18,887.31x = 377,275,483.56
  5. Step 5: Solve for x
    x = 377,275,483.56/18,887.31
  6. Step 6: Final answer
    x = 19,975.08

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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.