Home / 20,913.90-28,902.66-17,131.07

Finding the Fourth Proportional to 20,913.90, 28,902.66 and 17,131.07

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Solution

The fourth proportional to 20,913.90, 28,902.66 and 17,131.07 is: 23,674.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.90 : 28,902.66 = 17,131.07 : x
  2. Step 2: Convert to fraction form
    20,913.90/28,902.66 = 17,131.07/x
  3. Step 3: Cross multiply
    20,913.90x = 28,902.66 × 17,131.07
  4. Step 4: Simplify right side
    20,913.90x = 495,133,491.65
  5. Step 5: Solve for x
    x = 495,133,491.65/20,913.90
  6. Step 6: Final answer
    x = 23,674.85

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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.