Home / 13,389.36-18,478.62-7,800

Finding the Fourth Proportional to 13,389.36, 18,478.62 and 7,800

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Solution

The fourth proportional to 13,389.36, 18,478.62 and 7,800 is: 10,764.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.36 : 18,478.62 = 7,800 : x
  2. Step 2: Convert to fraction form
    13,389.36/18,478.62 = 7,800/x
  3. Step 3: Cross multiply
    13,389.36x = 18,478.62 × 7,800
  4. Step 4: Simplify right side
    13,389.36x = 144,133,236
  5. Step 5: Solve for x
    x = 144,133,236/13,389.36
  6. Step 6: Final answer
    x = 10,764.76

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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.