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Finding the Fourth Proportional to 12,679.70, 18,927.93 and 11,124.50

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Solution

The fourth proportional to 12,679.70, 18,927.93 and 11,124.50 is: 16,606.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.70 : 18,927.93 = 11,124.50 : x
  2. Step 2: Convert to fraction form
    12,679.70/18,927.93 = 11,124.50/x
  3. Step 3: Cross multiply
    12,679.70x = 18,927.93 × 11,124.50
  4. Step 4: Simplify right side
    12,679.70x = 210,563,701.66
  5. Step 5: Solve for x
    x = 210,563,701.66/12,679.70
  6. Step 6: Final answer
    x = 16,606.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.