Home / 20,663.51-28,515.83-11,232.09

Finding the Fourth Proportional to 20,663.51, 28,515.83 and 11,232.09

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Solution

The fourth proportional to 20,663.51, 28,515.83 and 11,232.09 is: 15,500.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.51 : 28,515.83 = 11,232.09 : x
  2. Step 2: Convert to fraction form
    20,663.51/28,515.83 = 11,232.09/x
  3. Step 3: Cross multiply
    20,663.51x = 28,515.83 × 11,232.09
  4. Step 4: Simplify right side
    20,663.51x = 320,292,312.82
  5. Step 5: Solve for x
    x = 320,292,312.82/20,663.51
  6. Step 6: Final answer
    x = 15,500.39

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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.