Home / 20,807.16-28,713.74-11,375.75

Finding the Fourth Proportional to 20,807.16, 28,713.74 and 11,375.75

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Solution

The fourth proportional to 20,807.16, 28,713.74 and 11,375.75 is: 15,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.16 : 28,713.74 = 11,375.75 : x
  2. Step 2: Convert to fraction form
    20,807.16/28,713.74 = 11,375.75/x
  3. Step 3: Cross multiply
    20,807.16x = 28,713.74 × 11,375.75
  4. Step 4: Simplify right side
    20,807.16x = 326,640,127.36
  5. Step 5: Solve for x
    x = 326,640,127.36/20,807.16
  6. Step 6: Final answer
    x = 15,698.45

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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.