Home / 13,987.30-20,981-5,667.48

Finding the Fourth Proportional to 13,987.30, 20,981 and 5,667.48

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Solution

The fourth proportional to 13,987.30, 20,981 and 5,667.48 is: 8,501.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.30 : 20,981 = 5,667.48 : x
  2. Step 2: Convert to fraction form
    13,987.30/20,981 = 5,667.48/x
  3. Step 3: Cross multiply
    13,987.30x = 20,981 × 5,667.48
  4. Step 4: Simplify right side
    13,987.30x = 118,909,397.88
  5. Step 5: Solve for x
    x = 118,909,397.88/13,987.30
  6. Step 6: Final answer
    x = 8,501.24

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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.