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Finding the Fourth Proportional to 14,479.76, 19,982.88 and 8,513.36

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Solution

The fourth proportional to 14,479.76, 19,982.88 and 8,513.36 is: 11,748.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,479.76 : 19,982.88 = 8,513.36 : x
  2. Step 2: Convert to fraction form
    14,479.76/19,982.88 = 8,513.36/x
  3. Step 3: Cross multiply
    14,479.76x = 19,982.88 × 8,513.36
  4. Step 4: Simplify right side
    14,479.76x = 170,121,451.28
  5. Step 5: Solve for x
    x = 170,121,451.28/14,479.76
  6. Step 6: Final answer
    x = 11,748.91

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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.