Home / 20,814.80-28,733.80-13,271.25

Finding the Fourth Proportional to 20,814.80, 28,733.80 and 13,271.25

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Solution

The fourth proportional to 20,814.80, 28,733.80 and 13,271.25 is: 18,320.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.80 : 28,733.80 = 13,271.25 : x
  2. Step 2: Convert to fraction form
    20,814.80/28,733.80 = 13,271.25/x
  3. Step 3: Cross multiply
    20,814.80x = 28,733.80 × 13,271.25
  4. Step 4: Simplify right side
    20,814.80x = 381,333,443.25
  5. Step 5: Solve for x
    x = 381,333,443.25/20,814.80
  6. Step 6: Final answer
    x = 18,320.30

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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.