Home / 20,910.86-28,848.77-11,953.56

Finding the Fourth Proportional to 20,910.86, 28,848.77 and 11,953.56

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Solution

The fourth proportional to 20,910.86, 28,848.77 and 11,953.56 is: 16,491.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.86 : 28,848.77 = 11,953.56 : x
  2. Step 2: Convert to fraction form
    20,910.86/28,848.77 = 11,953.56/x
  3. Step 3: Cross multiply
    20,910.86x = 28,848.77 × 11,953.56
  4. Step 4: Simplify right side
    20,910.86x = 344,845,501.33
  5. Step 5: Solve for x
    x = 344,845,501.33/20,910.86
  6. Step 6: Final answer
    x = 16,491.22

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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.