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Finding the Fourth Proportional to 13,992.80, 20,992.64 and 4,132.04

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Solution

The fourth proportional to 13,992.80, 20,992.64 and 4,132.04 is: 6,199.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.80 : 20,992.64 = 4,132.04 : x
  2. Step 2: Convert to fraction form
    13,992.80/20,992.64 = 4,132.04/x
  3. Step 3: Cross multiply
    13,992.80x = 20,992.64 × 4,132.04
  4. Step 4: Simplify right side
    13,992.80x = 86,742,428.19
  5. Step 5: Solve for x
    x = 86,742,428.19/13,992.80
  6. Step 6: Final answer
    x = 6,199.08

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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.