Home / 20,945.62-28,905.51-11,386.15

Finding the Fourth Proportional to 20,945.62, 28,905.51 and 11,386.15

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Solution

The fourth proportional to 20,945.62, 28,905.51 and 11,386.15 is: 15,713.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.62 : 28,905.51 = 11,386.15 : x
  2. Step 2: Convert to fraction form
    20,945.62/28,905.51 = 11,386.15/x
  3. Step 3: Cross multiply
    20,945.62x = 28,905.51 × 11,386.15
  4. Step 4: Simplify right side
    20,945.62x = 329,122,644.21
  5. Step 5: Solve for x
    x = 329,122,644.21/20,945.62
  6. Step 6: Final answer
    x = 15,713.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.