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Finding the Fourth Proportional to 18,995.70, 28,494.76 and 7,308.91

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Solution

The fourth proportional to 18,995.70, 28,494.76 and 7,308.91 is: 10,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.70 : 28,494.76 = 7,308.91 : x
  2. Step 2: Convert to fraction form
    18,995.70/28,494.76 = 7,308.91/x
  3. Step 3: Cross multiply
    18,995.70x = 28,494.76 × 7,308.91
  4. Step 4: Simplify right side
    18,995.70x = 208,265,636.31
  5. Step 5: Solve for x
    x = 208,265,636.31/18,995.70
  6. Step 6: Final answer
    x = 10,963.83

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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.