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Finding the Fourth Proportional to 14,490.80, 21,736.20 and 8,853.20

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Solution

The fourth proportional to 14,490.80, 21,736.20 and 8,853.20 is: 13,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490.80 : 21,736.20 = 8,853.20 : x
  2. Step 2: Convert to fraction form
    14,490.80/21,736.20 = 8,853.20/x
  3. Step 3: Cross multiply
    14,490.80x = 21,736.20 × 8,853.20
  4. Step 4: Simplify right side
    14,490.80x = 192,434,925.84
  5. Step 5: Solve for x
    x = 192,434,925.84/14,490.80
  6. Step 6: Final answer
    x = 13,279.80

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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.