Home / 20,997.40-28,976.45-11,437.26

Finding the Fourth Proportional to 20,997.40, 28,976.45 and 11,437.26

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Solution

The fourth proportional to 20,997.40, 28,976.45 and 11,437.26 is: 15,783.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.40 : 28,976.45 = 11,437.26 : x
  2. Step 2: Convert to fraction form
    20,997.40/28,976.45 = 11,437.26/x
  3. Step 3: Cross multiply
    20,997.40x = 28,976.45 × 11,437.26
  4. Step 4: Simplify right side
    20,997.40x = 331,411,192.53
  5. Step 5: Solve for x
    x = 331,411,192.53/20,997.40
  6. Step 6: Final answer
    x = 15,783.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.