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Finding the Fourth Proportional to 20,563.64, 28,376.10 and 12,064.88

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Solution

The fourth proportional to 20,563.64, 28,376.10 and 12,064.88 is: 16,648.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.64 : 28,376.10 = 12,064.88 : x
  2. Step 2: Convert to fraction form
    20,563.64/28,376.10 = 12,064.88/x
  3. Step 3: Cross multiply
    20,563.64x = 28,376.10 × 12,064.88
  4. Step 4: Simplify right side
    20,563.64x = 342,354,099.49
  5. Step 5: Solve for x
    x = 342,354,099.49/20,563.64
  6. Step 6: Final answer
    x = 16,648.52

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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.