Home / 20,631.12-28,477.46-13,179.12

Finding the Fourth Proportional to 20,631.12, 28,477.46 and 13,179.12

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Solution

The fourth proportional to 20,631.12, 28,477.46 and 13,179.12 is: 18,191.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.12 : 28,477.46 = 13,179.12 : x
  2. Step 2: Convert to fraction form
    20,631.12/28,477.46 = 13,179.12/x
  3. Step 3: Cross multiply
    20,631.12x = 28,477.46 × 13,179.12
  4. Step 4: Simplify right side
    20,631.12x = 375,307,862.64
  5. Step 5: Solve for x
    x = 375,307,862.64/20,631.12
  6. Step 6: Final answer
    x = 18,191.35

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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.