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Finding the Fourth Proportional to 26,940.16, 40,416.64 and 8,472

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Solution

The fourth proportional to 26,940.16, 40,416.64 and 8,472 is: 12,710.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,940.16 : 40,416.64 = 8,472 : x
  2. Step 2: Convert to fraction form
    26,940.16/40,416.64 = 8,472/x
  3. Step 3: Cross multiply
    26,940.16x = 40,416.64 × 8,472
  4. Step 4: Simplify right side
    26,940.16x = 342,409,774.08
  5. Step 5: Solve for x
    x = 342,409,774.08/26,940.16
  6. Step 6: Final answer
    x = 12,710.01

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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.