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Finding the Fourth Proportional to 18,751.63, 28,113.55 and 11,354.35

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Solution

The fourth proportional to 18,751.63, 28,113.55 and 11,354.35 is: 17,023.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.63 : 28,113.55 = 11,354.35 : x
  2. Step 2: Convert to fraction form
    18,751.63/28,113.55 = 11,354.35/x
  3. Step 3: Cross multiply
    18,751.63x = 28,113.55 × 11,354.35
  4. Step 4: Simplify right side
    18,751.63x = 319,211,086.44
  5. Step 5: Solve for x
    x = 319,211,086.44/18,751.63
  6. Step 6: Final answer
    x = 17,023.11

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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.