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Finding the Fourth Proportional to 13,642.58, 20,453.44 and 12,251.74

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Solution

The fourth proportional to 13,642.58, 20,453.44 and 12,251.74 is: 18,368.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.58 : 20,453.44 = 12,251.74 : x
  2. Step 2: Convert to fraction form
    13,642.58/20,453.44 = 12,251.74/x
  3. Step 3: Cross multiply
    13,642.58x = 20,453.44 × 12,251.74
  4. Step 4: Simplify right side
    13,642.58x = 250,590,228.99
  5. Step 5: Solve for x
    x = 250,590,228.99/13,642.58
  6. Step 6: Final answer
    x = 18,368.24

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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.