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Finding the Fourth Proportional to 11,940.21, 16,465.95 and 7,905.20

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Solution

The fourth proportional to 11,940.21, 16,465.95 and 7,905.20 is: 10,901.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,940.21 : 16,465.95 = 7,905.20 : x
  2. Step 2: Convert to fraction form
    11,940.21/16,465.95 = 7,905.20/x
  3. Step 3: Cross multiply
    11,940.21x = 16,465.95 × 7,905.20
  4. Step 4: Simplify right side
    11,940.21x = 130,166,545.61
  5. Step 5: Solve for x
    x = 130,166,545.61/11,940.21
  6. Step 6: Final answer
    x = 10,901.53

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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.