Home / 13,215.36-18,235.36-7,908.96

Finding the Fourth Proportional to 13,215.36, 18,235.36 and 7,908.96

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Solution

The fourth proportional to 13,215.36, 18,235.36 and 7,908.96 is: 10,913.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.36 : 18,235.36 = 7,908.96 : x
  2. Step 2: Convert to fraction form
    13,215.36/18,235.36 = 7,908.96/x
  3. Step 3: Cross multiply
    13,215.36x = 18,235.36 × 7,908.96
  4. Step 4: Simplify right side
    13,215.36x = 144,222,732.83
  5. Step 5: Solve for x
    x = 144,222,732.83/13,215.36
  6. Step 6: Final answer
    x = 10,913.27

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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.