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Finding the Fourth Proportional to 19,161.31, 28,741.98 and 5,310.31

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Solution

The fourth proportional to 19,161.31, 28,741.98 and 5,310.31 is: 7,965.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161.31 : 28,741.98 = 5,310.31 : x
  2. Step 2: Convert to fraction form
    19,161.31/28,741.98 = 5,310.31/x
  3. Step 3: Cross multiply
    19,161.31x = 28,741.98 × 5,310.31
  4. Step 4: Simplify right side
    19,161.31x = 152,628,823.81
  5. Step 5: Solve for x
    x = 152,628,823.81/19,161.31
  6. Step 6: Final answer
    x = 7,965.47

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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.