Home / 21,008.56-28,991.44-11,448.53

Finding the Fourth Proportional to 21,008.56, 28,991.44 and 11,448.53

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Solution

The fourth proportional to 21,008.56, 28,991.44 and 11,448.53 is: 15,798.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.56 : 28,991.44 = 11,448.53 : x
  2. Step 2: Convert to fraction form
    21,008.56/28,991.44 = 11,448.53/x
  3. Step 3: Cross multiply
    21,008.56x = 28,991.44 × 11,448.53
  4. Step 4: Simplify right side
    21,008.56x = 331,909,305.72
  5. Step 5: Solve for x
    x = 331,909,305.72/21,008.56
  6. Step 6: Final answer
    x = 15,798.77

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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.