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Finding the Fourth Proportional to 22,289.52, 30,764.08 and 12,856.80

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Solution

The fourth proportional to 22,289.52, 30,764.08 and 12,856.80 is: 17,745.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,289.52 : 30,764.08 = 12,856.80 : x
  2. Step 2: Convert to fraction form
    22,289.52/30,764.08 = 12,856.80/x
  3. Step 3: Cross multiply
    22,289.52x = 30,764.08 × 12,856.80
  4. Step 4: Simplify right side
    22,289.52x = 395,527,623.74
  5. Step 5: Solve for x
    x = 395,527,623.74/22,289.52
  6. Step 6: Final answer
    x = 17,745.00

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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.