Home / 21,997.40-32,996.10-12,666.20

Finding the Fourth Proportional to 21,997.40, 32,996.10 and 12,666.20

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Solution

The fourth proportional to 21,997.40, 32,996.10 and 12,666.20 is: 18,999.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.40 : 32,996.10 = 12,666.20 : x
  2. Step 2: Convert to fraction form
    21,997.40/32,996.10 = 12,666.20/x
  3. Step 3: Cross multiply
    21,997.40x = 32,996.10 × 12,666.20
  4. Step 4: Simplify right side
    21,997.40x = 417,935,201.82
  5. Step 5: Solve for x
    x = 417,935,201.82/21,997.40
  6. Step 6: Final answer
    x = 18,999.30

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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.