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Finding the Fourth Proportional to 14,284.80, 19,737.60 and 12,748.80

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Solution

The fourth proportional to 14,284.80, 19,737.60 and 12,748.80 is: 17,615.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,284.80 : 19,737.60 = 12,748.80 : x
  2. Step 2: Convert to fraction form
    14,284.80/19,737.60 = 12,748.80/x
  3. Step 3: Cross multiply
    14,284.80x = 19,737.60 × 12,748.80
  4. Step 4: Simplify right side
    14,284.80x = 251,630,714.88
  5. Step 5: Solve for x
    x = 251,630,714.88/14,284.80
  6. Step 6: Final answer
    x = 17,615.28

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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.