Home / 20,807.46-28,706.13-13,251.78

Finding the Fourth Proportional to 20,807.46, 28,706.13 and 13,251.78

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Solution

The fourth proportional to 20,807.46, 28,706.13 and 13,251.78 is: 18,282.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.46 : 28,706.13 = 13,251.78 : x
  2. Step 2: Convert to fraction form
    20,807.46/28,706.13 = 13,251.78/x
  3. Step 3: Cross multiply
    20,807.46x = 28,706.13 × 13,251.78
  4. Step 4: Simplify right side
    20,807.46x = 380,407,319.41
  5. Step 5: Solve for x
    x = 380,407,319.41/20,807.46
  6. Step 6: Final answer
    x = 18,282.26

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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.