Home / 18,938.52-28,413-16,872.80

Finding the Fourth Proportional to 18,938.52, 28,413 and 16,872.80

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Solution

The fourth proportional to 18,938.52, 28,413 and 16,872.80 is: 25,313.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.52 : 28,413 = 16,872.80 : x
  2. Step 2: Convert to fraction form
    18,938.52/28,413 = 16,872.80/x
  3. Step 3: Cross multiply
    18,938.52x = 28,413 × 16,872.80
  4. Step 4: Simplify right side
    18,938.52x = 479,406,866.40
  5. Step 5: Solve for x
    x = 479,406,866.40/18,938.52
  6. Step 6: Final answer
    x = 25,313.85

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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.