Home / 28,105.36-42,178.83-13,314.32

Finding the Fourth Proportional to 28,105.36, 42,178.83 and 13,314.32

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Solution

The fourth proportional to 28,105.36, 42,178.83 and 13,314.32 is: 19,981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.36 : 42,178.83 = 13,314.32 : x
  2. Step 2: Convert to fraction form
    28,105.36/42,178.83 = 13,314.32/x
  3. Step 3: Cross multiply
    28,105.36x = 42,178.83 × 13,314.32
  4. Step 4: Simplify right side
    28,105.36x = 561,582,439.85
  5. Step 5: Solve for x
    x = 561,582,439.85/28,105.36
  6. Step 6: Final answer
    x = 19,981.33

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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.