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Finding the Fourth Proportional to 28,960.66, 39,940.05 and 19,541.98

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Solution

The fourth proportional to 28,960.66, 39,940.05 and 19,541.98 is: 26,950.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,960.66 : 39,940.05 = 19,541.98 : x
  2. Step 2: Convert to fraction form
    28,960.66/39,940.05 = 19,541.98/x
  3. Step 3: Cross multiply
    28,960.66x = 39,940.05 × 19,541.98
  4. Step 4: Simplify right side
    28,960.66x = 780,507,658.30
  5. Step 5: Solve for x
    x = 780,507,658.30/28,960.66
  6. Step 6: Final answer
    x = 26,950.62

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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.