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Finding the Fourth Proportional to 15,978.45, 22,051.23 and 8,904.86

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Solution

The fourth proportional to 15,978.45, 22,051.23 and 8,904.86 is: 12,289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.45 : 22,051.23 = 8,904.86 : x
  2. Step 2: Convert to fraction form
    15,978.45/22,051.23 = 8,904.86/x
  3. Step 3: Cross multiply
    15,978.45x = 22,051.23 × 8,904.86
  4. Step 4: Simplify right side
    15,978.45x = 196,363,115.98
  5. Step 5: Solve for x
    x = 196,363,115.98/15,978.45
  6. Step 6: Final answer
    x = 12,289.25

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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.