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Finding the Fourth Proportional to 15,978.35, 22,050.23 and 8,905.23

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Solution

The fourth proportional to 15,978.35, 22,050.23 and 8,905.23 is: 12,289.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.35 : 22,050.23 = 8,905.23 : x
  2. Step 2: Convert to fraction form
    15,978.35/22,050.23 = 8,905.23/x
  3. Step 3: Cross multiply
    15,978.35x = 22,050.23 × 8,905.23
  4. Step 4: Simplify right side
    15,978.35x = 196,362,292.58
  5. Step 5: Solve for x
    x = 196,362,292.58/15,978.35
  6. Step 6: Final answer
    x = 12,289.27

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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.