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Finding the Fourth Proportional to 8,940.66, 13,362.47 and 8,240.34

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Solution

The fourth proportional to 8,940.66, 13,362.47 and 8,240.34 is: 12,315.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.66 : 13,362.47 = 8,240.34 : x
  2. Step 2: Convert to fraction form
    8,940.66/13,362.47 = 8,240.34/x
  3. Step 3: Cross multiply
    8,940.66x = 13,362.47 × 8,240.34
  4. Step 4: Simplify right side
    8,940.66x = 110,111,254.84
  5. Step 5: Solve for x
    x = 110,111,254.84/8,940.66
  6. Step 6: Final answer
    x = 12,315.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.