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Finding the Fourth Proportional to 12,889.85, 19,301.96 and 8,493.98

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Solution

The fourth proportional to 12,889.85, 19,301.96 and 8,493.98 is: 12,719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.85 : 19,301.96 = 8,493.98 : x
  2. Step 2: Convert to fraction form
    12,889.85/19,301.96 = 8,493.98/x
  3. Step 3: Cross multiply
    12,889.85x = 19,301.96 × 8,493.98
  4. Step 4: Simplify right side
    12,889.85x = 163,950,495.50
  5. Step 5: Solve for x
    x = 163,950,495.50/12,889.85
  6. Step 6: Final answer
    x = 12,719.35

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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.