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Finding the Fourth Proportional to 14,124.80, 21,180.80 and 5,356.80

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Solution

The fourth proportional to 14,124.80, 21,180.80 and 5,356.80 is: 8,032.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,124.80 : 21,180.80 = 5,356.80 : x
  2. Step 2: Convert to fraction form
    14,124.80/21,180.80 = 5,356.80/x
  3. Step 3: Cross multiply
    14,124.80x = 21,180.80 × 5,356.80
  4. Step 4: Simplify right side
    14,124.80x = 113,461,309.44
  5. Step 5: Solve for x
    x = 113,461,309.44/14,124.80
  6. Step 6: Final answer
    x = 8,032.77

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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.