Home / 13,551.78-18,699.21-7,963.86

Finding the Fourth Proportional to 13,551.78, 18,699.21 and 7,963.86

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Solution

The fourth proportional to 13,551.78, 18,699.21 and 7,963.86 is: 10,988.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,551.78 : 18,699.21 = 7,963.86 : x
  2. Step 2: Convert to fraction form
    13,551.78/18,699.21 = 7,963.86/x
  3. Step 3: Cross multiply
    13,551.78x = 18,699.21 × 7,963.86
  4. Step 4: Simplify right side
    13,551.78x = 148,917,890.55
  5. Step 5: Solve for x
    x = 148,917,890.55/13,551.78
  6. Step 6: Final answer
    x = 10,988.81

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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.