Home / 20,403.63-28,157.52-11,451.81

Finding the Fourth Proportional to 20,403.63, 28,157.52 and 11,451.81

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Solution

The fourth proportional to 20,403.63, 28,157.52 and 11,451.81 is: 15,803.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.63 : 28,157.52 = 11,451.81 : x
  2. Step 2: Convert to fraction form
    20,403.63/28,157.52 = 11,451.81/x
  3. Step 3: Cross multiply
    20,403.63x = 28,157.52 × 11,451.81
  4. Step 4: Simplify right side
    20,403.63x = 322,454,569.11
  5. Step 5: Solve for x
    x = 322,454,569.11/20,403.63
  6. Step 6: Final answer
    x = 15,803.78

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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.