Home / 28,128.11-42,201.41-11,502.13

Finding the Fourth Proportional to 28,128.11, 42,201.41 and 11,502.13

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Solution

The fourth proportional to 28,128.11, 42,201.41 and 11,502.13 is: 17,256.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.11 : 42,201.41 = 11,502.13 : x
  2. Step 2: Convert to fraction form
    28,128.11/42,201.41 = 11,502.13/x
  3. Step 3: Cross multiply
    28,128.11x = 42,201.41 × 11,502.13
  4. Step 4: Simplify right side
    28,128.11x = 485,405,901.43
  5. Step 5: Solve for x
    x = 485,405,901.43/28,128.11
  6. Step 6: Final answer
    x = 17,256.97

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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.