Home / 28,716.64-39,613.76-21,630.72

Finding the Fourth Proportional to 28,716.64, 39,613.76 and 21,630.72

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Solution

The fourth proportional to 28,716.64, 39,613.76 and 21,630.72 is: 29,838.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,716.64 : 39,613.76 = 21,630.72 : x
  2. Step 2: Convert to fraction form
    28,716.64/39,613.76 = 21,630.72/x
  3. Step 3: Cross multiply
    28,716.64x = 39,613.76 × 21,630.72
  4. Step 4: Simplify right side
    28,716.64x = 856,874,150.71
  5. Step 5: Solve for x
    x = 856,874,150.71/28,716.64
  6. Step 6: Final answer
    x = 29,838.94

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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.