Home / 13,379.28-18,461.81-7,715.88

Finding the Fourth Proportional to 13,379.28, 18,461.81 and 7,715.88

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Solution

The fourth proportional to 13,379.28, 18,461.81 and 7,715.88 is: 10,646.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.28 : 18,461.81 = 7,715.88 : x
  2. Step 2: Convert to fraction form
    13,379.28/18,461.81 = 7,715.88/x
  3. Step 3: Cross multiply
    13,379.28x = 18,461.81 × 7,715.88
  4. Step 4: Simplify right side
    13,379.28x = 142,449,110.54
  5. Step 5: Solve for x
    x = 142,449,110.54/13,379.28
  6. Step 6: Final answer
    x = 10,646.99

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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.