Home / 20,210.40-27,879.12-11,825.28

Finding the Fourth Proportional to 20,210.40, 27,879.12 and 11,825.28

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Solution

The fourth proportional to 20,210.40, 27,879.12 and 11,825.28 is: 16,312.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.40 : 27,879.12 = 11,825.28 : x
  2. Step 2: Convert to fraction form
    20,210.40/27,879.12 = 11,825.28/x
  3. Step 3: Cross multiply
    20,210.40x = 27,879.12 × 11,825.28
  4. Step 4: Simplify right side
    20,210.40x = 329,678,400.15
  5. Step 5: Solve for x
    x = 329,678,400.15/20,210.40
  6. Step 6: Final answer
    x = 16,312.31

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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.