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Finding the Fourth Proportional to 13,778.66, 20,667.53 and 5,987.48

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Solution

The fourth proportional to 13,778.66, 20,667.53 and 5,987.48 is: 8,981.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.66 : 20,667.53 = 5,987.48 : x
  2. Step 2: Convert to fraction form
    13,778.66/20,667.53 = 5,987.48/x
  3. Step 3: Cross multiply
    13,778.66x = 20,667.53 × 5,987.48
  4. Step 4: Simplify right side
    13,778.66x = 123,746,334.16
  5. Step 5: Solve for x
    x = 123,746,334.16/13,778.66
  6. Step 6: Final answer
    x = 8,981.01

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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.