Home / 20,995.23-28,975.46-15,680.82

Finding the Fourth Proportional to 20,995.23, 28,975.46 and 15,680.82

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Solution

The fourth proportional to 20,995.23, 28,975.46 and 15,680.82 is: 21,641.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.23 : 28,975.46 = 15,680.82 : x
  2. Step 2: Convert to fraction form
    20,995.23/28,975.46 = 15,680.82/x
  3. Step 3: Cross multiply
    20,995.23x = 28,975.46 × 15,680.82
  4. Step 4: Simplify right side
    20,995.23x = 454,358,749.40
  5. Step 5: Solve for x
    x = 454,358,749.40/20,995.23
  6. Step 6: Final answer
    x = 21,641.05

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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.