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Finding the Fourth Proportional to 14,999.76, 20,698.47 and 8,712.54

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Solution

The fourth proportional to 14,999.76, 20,698.47 and 8,712.54 is: 12,022.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,999.76 : 20,698.47 = 8,712.54 : x
  2. Step 2: Convert to fraction form
    14,999.76/20,698.47 = 8,712.54/x
  3. Step 3: Cross multiply
    14,999.76x = 20,698.47 × 8,712.54
  4. Step 4: Simplify right side
    14,999.76x = 180,336,247.81
  5. Step 5: Solve for x
    x = 180,336,247.81/14,999.76
  6. Step 6: Final answer
    x = 12,022.61

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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.