Home / 20,475.15-28,231.32-13,746.48

Finding the Fourth Proportional to 20,475.15, 28,231.32 and 13,746.48

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Solution

The fourth proportional to 20,475.15, 28,231.32 and 13,746.48 is: 18,953.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.15 : 28,231.32 = 13,746.48 : x
  2. Step 2: Convert to fraction form
    20,475.15/28,231.32 = 13,746.48/x
  3. Step 3: Cross multiply
    20,475.15x = 28,231.32 × 13,746.48
  4. Step 4: Simplify right side
    20,475.15x = 388,081,275.75
  5. Step 5: Solve for x
    x = 388,081,275.75/20,475.15
  6. Step 6: Final answer
    x = 18,953.77

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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.