Home / 13,415.90-20,127.45-11,965.10

Finding the Fourth Proportional to 13,415.90, 20,127.45 and 11,965.10

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Solution

The fourth proportional to 13,415.90, 20,127.45 and 11,965.10 is: 17,950.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.90 : 20,127.45 = 11,965.10 : x
  2. Step 2: Convert to fraction form
    13,415.90/20,127.45 = 11,965.10/x
  3. Step 3: Cross multiply
    13,415.90x = 20,127.45 × 11,965.10
  4. Step 4: Simplify right side
    13,415.90x = 240,826,952.00
  5. Step 5: Solve for x
    x = 240,826,952.00/13,415.90
  6. Step 6: Final answer
    x = 17,950.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.