Home / 20,101.15-27,707.61-15,845.31

Finding the Fourth Proportional to 20,101.15, 27,707.61 and 15,845.31

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Solution

The fourth proportional to 20,101.15, 27,707.61 and 15,845.31 is: 21,841.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,101.15 : 27,707.61 = 15,845.31 : x
  2. Step 2: Convert to fraction form
    20,101.15/27,707.61 = 15,845.31/x
  3. Step 3: Cross multiply
    20,101.15x = 27,707.61 × 15,845.31
  4. Step 4: Simplify right side
    20,101.15x = 439,035,669.81
  5. Step 5: Solve for x
    x = 439,035,669.81/20,101.15
  6. Step 6: Final answer
    x = 21,841.32

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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.