Home / 20,878.44-31,320.54-11,018.40

Finding the Fourth Proportional to 20,878.44, 31,320.54 and 11,018.40

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Solution

The fourth proportional to 20,878.44, 31,320.54 and 11,018.40 is: 16,529.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.44 : 31,320.54 = 11,018.40 : x
  2. Step 2: Convert to fraction form
    20,878.44/31,320.54 = 11,018.40/x
  3. Step 3: Cross multiply
    20,878.44x = 31,320.54 × 11,018.40
  4. Step 4: Simplify right side
    20,878.44x = 345,102,237.94
  5. Step 5: Solve for x
    x = 345,102,237.94/20,878.44
  6. Step 6: Final answer
    x = 16,529.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.