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Finding the Fourth Proportional to 12,239.28, 16,890.48 and 6,935.22

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Solution

The fourth proportional to 12,239.28, 16,890.48 and 6,935.22 is: 9,570.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.28 : 16,890.48 = 6,935.22 : x
  2. Step 2: Convert to fraction form
    12,239.28/16,890.48 = 6,935.22/x
  3. Step 3: Cross multiply
    12,239.28x = 16,890.48 × 6,935.22
  4. Step 4: Simplify right side
    12,239.28x = 117,139,194.71
  5. Step 5: Solve for x
    x = 117,139,194.71/12,239.28
  6. Step 6: Final answer
    x = 9,570.76

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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.