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Finding the Fourth Proportional to 19,880.52, 29,827.76 and 8,785.76

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Solution

The fourth proportional to 19,880.52, 29,827.76 and 8,785.76 is: 13,181.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.52 : 29,827.76 = 8,785.76 : x
  2. Step 2: Convert to fraction form
    19,880.52/29,827.76 = 8,785.76/x
  3. Step 3: Cross multiply
    19,880.52x = 29,827.76 × 8,785.76
  4. Step 4: Simplify right side
    19,880.52x = 262,059,540.70
  5. Step 5: Solve for x
    x = 262,059,540.70/19,880.52
  6. Step 6: Final answer
    x = 13,181.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.