Home / 13,778.16-18,988.44-11,540.40

Finding the Fourth Proportional to 13,778.16, 18,988.44 and 11,540.40

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Solution

The fourth proportional to 13,778.16, 18,988.44 and 11,540.40 is: 15,904.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.16 : 18,988.44 = 11,540.40 : x
  2. Step 2: Convert to fraction form
    13,778.16/18,988.44 = 11,540.40/x
  3. Step 3: Cross multiply
    13,778.16x = 18,988.44 × 11,540.40
  4. Step 4: Simplify right side
    13,778.16x = 219,134,192.98
  5. Step 5: Solve for x
    x = 219,134,192.98/13,778.16
  6. Step 6: Final answer
    x = 15,904.46

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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.