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Finding the Fourth Proportional to 26,940.70, 40,411.05 and 7,218.76

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Solution

The fourth proportional to 26,940.70, 40,411.05 and 7,218.76 is: 10,828.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,940.70 : 40,411.05 = 7,218.76 : x
  2. Step 2: Convert to fraction form
    26,940.70/40,411.05 = 7,218.76/x
  3. Step 3: Cross multiply
    26,940.70x = 40,411.05 × 7,218.76
  4. Step 4: Simplify right side
    26,940.70x = 291,717,671.30
  5. Step 5: Solve for x
    x = 291,717,671.30/26,940.70
  6. Step 6: Final answer
    x = 10,828.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.