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Finding the Fourth Proportional to 18,865.48, 28,255.08 and 9,011.68

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Solution

The fourth proportional to 18,865.48, 28,255.08 and 9,011.68 is: 13,496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.48 : 28,255.08 = 9,011.68 : x
  2. Step 2: Convert to fraction form
    18,865.48/28,255.08 = 9,011.68/x
  3. Step 3: Cross multiply
    18,865.48x = 28,255.08 × 9,011.68
  4. Step 4: Simplify right side
    18,865.48x = 254,625,739.33
  5. Step 5: Solve for x
    x = 254,625,739.33/18,865.48
  6. Step 6: Final answer
    x = 13,496.91

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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.