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Finding the Fourth Proportional to 14,117.20, 21,175.80 and 11,813.20

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Solution

The fourth proportional to 14,117.20, 21,175.80 and 11,813.20 is: 17,719.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,117.20 : 21,175.80 = 11,813.20 : x
  2. Step 2: Convert to fraction form
    14,117.20/21,175.80 = 11,813.20/x
  3. Step 3: Cross multiply
    14,117.20x = 21,175.80 × 11,813.20
  4. Step 4: Simplify right side
    14,117.20x = 250,153,960.56
  5. Step 5: Solve for x
    x = 250,153,960.56/14,117.20
  6. Step 6: Final answer
    x = 17,719.80

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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.