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Finding the Fourth Proportional to 18,398.28, 27,581.82 and 7,312.80

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Solution

The fourth proportional to 18,398.28, 27,581.82 and 7,312.80 is: 10,963.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.28 : 27,581.82 = 7,312.80 : x
  2. Step 2: Convert to fraction form
    18,398.28/27,581.82 = 7,312.80/x
  3. Step 3: Cross multiply
    18,398.28x = 27,581.82 × 7,312.80
  4. Step 4: Simplify right side
    18,398.28x = 201,700,333.30
  5. Step 5: Solve for x
    x = 201,700,333.30/18,398.28
  6. Step 6: Final answer
    x = 10,963.00

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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.