Home / 13,742.98-18,965.80-8,077.66

Finding the Fourth Proportional to 13,742.98, 18,965.80 and 8,077.66

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Solution

The fourth proportional to 13,742.98, 18,965.80 and 8,077.66 is: 11,147.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.98 : 18,965.80 = 8,077.66 : x
  2. Step 2: Convert to fraction form
    13,742.98/18,965.80 = 8,077.66/x
  3. Step 3: Cross multiply
    13,742.98x = 18,965.80 × 8,077.66
  4. Step 4: Simplify right side
    13,742.98x = 153,199,201.27
  5. Step 5: Solve for x
    x = 153,199,201.27/13,742.98
  6. Step 6: Final answer
    x = 11,147.45

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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.