Home / 20,846.69-28,772.90-13,291.28

Finding the Fourth Proportional to 20,846.69, 28,772.90 and 13,291.28

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Solution

The fourth proportional to 20,846.69, 28,772.90 and 13,291.28 is: 18,344.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.69 : 28,772.90 = 13,291.28 : x
  2. Step 2: Convert to fraction form
    20,846.69/28,772.90 = 13,291.28/x
  3. Step 3: Cross multiply
    20,846.69x = 28,772.90 × 13,291.28
  4. Step 4: Simplify right side
    20,846.69x = 382,428,531.92
  5. Step 5: Solve for x
    x = 382,428,531.92/20,846.69
  6. Step 6: Final answer
    x = 18,344.81

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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.