Home / 20,371.77-28,111.86-11,417.63

Finding the Fourth Proportional to 20,371.77, 28,111.86 and 11,417.63

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Solution

The fourth proportional to 20,371.77, 28,111.86 and 11,417.63 is: 15,755.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.77 : 28,111.86 = 11,417.63 : x
  2. Step 2: Convert to fraction form
    20,371.77/28,111.86 = 11,417.63/x
  3. Step 3: Cross multiply
    20,371.77x = 28,111.86 × 11,417.63
  4. Step 4: Simplify right side
    20,371.77x = 320,970,675.53
  5. Step 5: Solve for x
    x = 320,970,675.53/20,371.77
  6. Step 6: Final answer
    x = 15,755.66

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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.