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Finding the Fourth Proportional to 18,461.79, 27,689.95 and 5,982.90

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Solution

The fourth proportional to 18,461.79, 27,689.95 and 5,982.90 is: 8,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.79 : 27,689.95 = 5,982.90 : x
  2. Step 2: Convert to fraction form
    18,461.79/27,689.95 = 5,982.90/x
  3. Step 3: Cross multiply
    18,461.79x = 27,689.95 × 5,982.90
  4. Step 4: Simplify right side
    18,461.79x = 165,666,201.86
  5. Step 5: Solve for x
    x = 165,666,201.86/18,461.79
  6. Step 6: Final answer
    x = 8,973.46

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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.