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Finding the Fourth Proportional to 14,965.92, 20,649.60 and 8,678.16

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Solution

The fourth proportional to 14,965.92, 20,649.60 and 8,678.16 is: 11,973.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,965.92 : 20,649.60 = 8,678.16 : x
  2. Step 2: Convert to fraction form
    14,965.92/20,649.60 = 8,678.16/x
  3. Step 3: Cross multiply
    14,965.92x = 20,649.60 × 8,678.16
  4. Step 4: Simplify right side
    14,965.92x = 179,200,532.74
  5. Step 5: Solve for x
    x = 179,200,532.74/14,965.92
  6. Step 6: Final answer
    x = 11,973.91

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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.