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Finding the Fourth Proportional to 18,639.88, 27,943.08 and 6,945.16

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Solution

The fourth proportional to 18,639.88, 27,943.08 and 6,945.16 is: 10,411.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.88 : 27,943.08 = 6,945.16 : x
  2. Step 2: Convert to fraction form
    18,639.88/27,943.08 = 6,945.16/x
  3. Step 3: Cross multiply
    18,639.88x = 27,943.08 × 6,945.16
  4. Step 4: Simplify right side
    18,639.88x = 194,069,161.49
  5. Step 5: Solve for x
    x = 194,069,161.49/18,639.88
  6. Step 6: Final answer
    x = 10,411.50

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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.