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Finding the Fourth Proportional to 12,899.76, 19,341.64 and 8,451.95

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Solution

The fourth proportional to 12,899.76, 19,341.64 and 8,451.95 is: 12,672.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,899.76 : 19,341.64 = 8,451.95 : x
  2. Step 2: Convert to fraction form
    12,899.76/19,341.64 = 8,451.95/x
  3. Step 3: Cross multiply
    12,899.76x = 19,341.64 × 8,451.95
  4. Step 4: Simplify right side
    12,899.76x = 163,474,440.51
  5. Step 5: Solve for x
    x = 163,474,440.51/12,899.76
  6. Step 6: Final answer
    x = 12,672.68

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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.