Home / 13,878.36-20,815.50-5,111.24

Finding the Fourth Proportional to 13,878.36, 20,815.50 and 5,111.24

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Solution

The fourth proportional to 13,878.36, 20,815.50 and 5,111.24 is: 7,666.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.36 : 20,815.50 = 5,111.24 : x
  2. Step 2: Convert to fraction form
    13,878.36/20,815.50 = 5,111.24/x
  3. Step 3: Cross multiply
    13,878.36x = 20,815.50 × 5,111.24
  4. Step 4: Simplify right side
    13,878.36x = 106,393,016.22
  5. Step 5: Solve for x
    x = 106,393,016.22/13,878.36
  6. Step 6: Final answer
    x = 7,666.11

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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.