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Finding the Fourth Proportional to 15,051.63, 20,770.83 and 8,678.10

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Solution

The fourth proportional to 15,051.63, 20,770.83 and 8,678.10 is: 11,975.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,051.63 : 20,770.83 = 8,678.10 : x
  2. Step 2: Convert to fraction form
    15,051.63/20,770.83 = 8,678.10/x
  3. Step 3: Cross multiply
    15,051.63x = 20,770.83 × 8,678.10
  4. Step 4: Simplify right side
    15,051.63x = 180,251,339.82
  5. Step 5: Solve for x
    x = 180,251,339.82/15,051.63
  6. Step 6: Final answer
    x = 11,975.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.