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Finding the Fourth Proportional to 12,275.55, 16,943.99 and 7,239.38

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Solution

The fourth proportional to 12,275.55, 16,943.99 and 7,239.38 is: 9,992.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,275.55 : 16,943.99 = 7,239.38 : x
  2. Step 2: Convert to fraction form
    12,275.55/16,943.99 = 7,239.38/x
  3. Step 3: Cross multiply
    12,275.55x = 16,943.99 × 7,239.38
  4. Step 4: Simplify right side
    12,275.55x = 122,663,861.41
  5. Step 5: Solve for x
    x = 122,663,861.41/12,275.55
  6. Step 6: Final answer
    x = 9,992.53

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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.