Home / 20,752.12-28,661.82-15,112.09

Finding the Fourth Proportional to 20,752.12, 28,661.82 and 15,112.09

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Solution

The fourth proportional to 20,752.12, 28,661.82 and 15,112.09 is: 20,872.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.12 : 28,661.82 = 15,112.09 : x
  2. Step 2: Convert to fraction form
    20,752.12/28,661.82 = 15,112.09/x
  3. Step 3: Cross multiply
    20,752.12x = 28,661.82 × 15,112.09
  4. Step 4: Simplify right side
    20,752.12x = 433,139,931.75
  5. Step 5: Solve for x
    x = 433,139,931.75/20,752.12
  6. Step 6: Final answer
    x = 20,872.08

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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.