Home / 39,585.76-54,628.32-21,680.68

Finding the Fourth Proportional to 39,585.76, 54,628.32 and 21,680.68

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Solution

The fourth proportional to 39,585.76, 54,628.32 and 21,680.68 is: 29,919.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,585.76 : 54,628.32 = 21,680.68 : x
  2. Step 2: Convert to fraction form
    39,585.76/54,628.32 = 21,680.68/x
  3. Step 3: Cross multiply
    39,585.76x = 54,628.32 × 21,680.68
  4. Step 4: Simplify right side
    39,585.76x = 1,184,379,124.86
  5. Step 5: Solve for x
    x = 1,184,379,124.86/39,585.76
  6. Step 6: Final answer
    x = 29,919.32

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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.