Home / 13,127.28-18,106.38-7,818

Finding the Fourth Proportional to 13,127.28, 18,106.38 and 7,818

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Solution

The fourth proportional to 13,127.28, 18,106.38 and 7,818 is: 10,783.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.28 : 18,106.38 = 7,818 : x
  2. Step 2: Convert to fraction form
    13,127.28/18,106.38 = 7,818/x
  3. Step 3: Cross multiply
    13,127.28x = 18,106.38 × 7,818
  4. Step 4: Simplify right side
    13,127.28x = 141,555,678.84
  5. Step 5: Solve for x
    x = 141,555,678.84/13,127.28
  6. Step 6: Final answer
    x = 10,783.32

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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.