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Finding the Fourth Proportional to 19,161.68, 28,742.52 and 5,310.32

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Solution

The fourth proportional to 19,161.68, 28,742.52 and 5,310.32 is: 7,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161.68 : 28,742.52 = 5,310.32 : x
  2. Step 2: Convert to fraction form
    19,161.68/28,742.52 = 5,310.32/x
  3. Step 3: Cross multiply
    19,161.68x = 28,742.52 × 5,310.32
  4. Step 4: Simplify right side
    19,161.68x = 152,631,978.81
  5. Step 5: Solve for x
    x = 152,631,978.81/19,161.68
  6. Step 6: Final answer
    x = 7,965.48

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Similar ratio
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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.