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Finding the Fourth Proportional to 18,866.70, 28,324.35 and 15,173.10

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Solution

The fourth proportional to 18,866.70, 28,324.35 and 15,173.10 is: 22,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.70 : 28,324.35 = 15,173.10 : x
  2. Step 2: Convert to fraction form
    18,866.70/28,324.35 = 15,173.10/x
  3. Step 3: Cross multiply
    18,866.70x = 28,324.35 × 15,173.10
  4. Step 4: Simplify right side
    18,866.70x = 429,768,194.99
  5. Step 5: Solve for x
    x = 429,768,194.99/18,866.70
  6. Step 6: Final answer
    x = 22,779.19

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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.