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Finding the Fourth Proportional to 20,368.80, 28,110.24 and 13,314.24

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Solution

The fourth proportional to 20,368.80, 28,110.24 and 13,314.24 is: 18,374.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.80 : 28,110.24 = 13,314.24 : x
  2. Step 2: Convert to fraction form
    20,368.80/28,110.24 = 13,314.24/x
  3. Step 3: Cross multiply
    20,368.80x = 28,110.24 × 13,314.24
  4. Step 4: Simplify right side
    20,368.80x = 374,266,481.82
  5. Step 5: Solve for x
    x = 374,266,481.82/20,368.80
  6. Step 6: Final answer
    x = 18,374.50

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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.