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Finding the Fourth Proportional to 14,787.76, 20,407.08 and 8,500.12

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Solution

The fourth proportional to 14,787.76, 20,407.08 and 8,500.12 is: 11,730.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,787.76 : 20,407.08 = 8,500.12 : x
  2. Step 2: Convert to fraction form
    14,787.76/20,407.08 = 8,500.12/x
  3. Step 3: Cross multiply
    14,787.76x = 20,407.08 × 8,500.12
  4. Step 4: Simplify right side
    14,787.76x = 173,462,628.85
  5. Step 5: Solve for x
    x = 173,462,628.85/14,787.76
  6. Step 6: Final answer
    x = 11,730.15

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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.