Home / 20,356.16-28,091.41-11,403.74

Finding the Fourth Proportional to 20,356.16, 28,091.41 and 11,403.74

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Solution

The fourth proportional to 20,356.16, 28,091.41 and 11,403.74 is: 15,737.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.16 : 28,091.41 = 11,403.74 : x
  2. Step 2: Convert to fraction form
    20,356.16/28,091.41 = 11,403.74/x
  3. Step 3: Cross multiply
    20,356.16x = 28,091.41 × 11,403.74
  4. Step 4: Simplify right side
    20,356.16x = 320,347,019.58
  5. Step 5: Solve for x
    x = 320,347,019.58/20,356.16
  6. Step 6: Final answer
    x = 15,737.10

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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.