Home / 20,810.46-28,710.26-13,254.78

Finding the Fourth Proportional to 20,810.46, 28,710.26 and 13,254.78

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Solution

The fourth proportional to 20,810.46, 28,710.26 and 13,254.78 is: 18,286.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.46 : 28,710.26 = 13,254.78 : x
  2. Step 2: Convert to fraction form
    20,810.46/28,710.26 = 13,254.78/x
  3. Step 3: Cross multiply
    20,810.46x = 28,710.26 × 13,254.78
  4. Step 4: Simplify right side
    20,810.46x = 380,548,180.04
  5. Step 5: Solve for x
    x = 380,548,180.04/20,810.46
  6. Step 6: Final answer
    x = 18,286.39

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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.