Home / 13,318.88-18,379.95-7,654.28

Finding the Fourth Proportional to 13,318.88, 18,379.95 and 7,654.28

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Solution

The fourth proportional to 13,318.88, 18,379.95 and 7,654.28 is: 10,562.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.88 : 18,379.95 = 7,654.28 : x
  2. Step 2: Convert to fraction form
    13,318.88/18,379.95 = 7,654.28/x
  3. Step 3: Cross multiply
    13,318.88x = 18,379.95 × 7,654.28
  4. Step 4: Simplify right side
    13,318.88x = 140,685,283.69
  5. Step 5: Solve for x
    x = 140,685,283.69/13,318.88
  6. Step 6: Final answer
    x = 10,562.85

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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.