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Finding the Fourth Proportional to 18,889.69, 28,335.55 and 5,741.07

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Solution

The fourth proportional to 18,889.69, 28,335.55 and 5,741.07 is: 8,611.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.69 : 28,335.55 = 5,741.07 : x
  2. Step 2: Convert to fraction form
    18,889.69/28,335.55 = 5,741.07/x
  3. Step 3: Cross multiply
    18,889.69x = 28,335.55 × 5,741.07
  4. Step 4: Simplify right side
    18,889.69x = 162,676,376.04
  5. Step 5: Solve for x
    x = 162,676,376.04/18,889.69
  6. Step 6: Final answer
    x = 8,611.91

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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.