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Finding the Fourth Proportional to 28,053.92, 42,076.92 and 11,421.20

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Solution

The fourth proportional to 28,053.92, 42,076.92 and 11,421.20 is: 17,130.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,053.92 : 42,076.92 = 11,421.20 : x
  2. Step 2: Convert to fraction form
    28,053.92/42,076.92 = 11,421.20/x
  3. Step 3: Cross multiply
    28,053.92x = 42,076.92 × 11,421.20
  4. Step 4: Simplify right side
    28,053.92x = 480,568,918.70
  5. Step 5: Solve for x
    x = 480,568,918.70/28,053.92
  6. Step 6: Final answer
    x = 17,130.19

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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.