Home / 13,681.85-20,603.30-11,947.64

Finding the Fourth Proportional to 13,681.85, 20,603.30 and 11,947.64

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Solution

The fourth proportional to 13,681.85, 20,603.30 and 11,947.64 is: 17,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.85 : 20,603.30 = 11,947.64 : x
  2. Step 2: Convert to fraction form
    13,681.85/20,603.30 = 11,947.64/x
  3. Step 3: Cross multiply
    13,681.85x = 20,603.30 × 11,947.64
  4. Step 4: Simplify right side
    13,681.85x = 246,160,892.59
  5. Step 5: Solve for x
    x = 246,160,892.59/13,681.85
  6. Step 6: Final answer
    x = 17,991.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.