Home / 20,112.96-27,763.20-13,828.80

Finding the Fourth Proportional to 20,112.96, 27,763.20 and 13,828.80

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Solution

The fourth proportional to 20,112.96, 27,763.20 and 13,828.80 is: 19,088.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.96 : 27,763.20 = 13,828.80 : x
  2. Step 2: Convert to fraction form
    20,112.96/27,763.20 = 13,828.80/x
  3. Step 3: Cross multiply
    20,112.96x = 27,763.20 × 13,828.80
  4. Step 4: Simplify right side
    20,112.96x = 383,931,740.16
  5. Step 5: Solve for x
    x = 383,931,740.16/20,112.96
  6. Step 6: Final answer
    x = 19,088.77

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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.