Home / 28,784.27-39,719.60-21,234.80

Finding the Fourth Proportional to 28,784.27, 39,719.60 and 21,234.80

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Solution

The fourth proportional to 28,784.27, 39,719.60 and 21,234.80 is: 29,302.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,784.27 : 39,719.60 = 21,234.80 : x
  2. Step 2: Convert to fraction form
    28,784.27/39,719.60 = 21,234.80/x
  3. Step 3: Cross multiply
    28,784.27x = 39,719.60 × 21,234.80
  4. Step 4: Simplify right side
    28,784.27x = 843,437,834.84
  5. Step 5: Solve for x
    x = 843,437,834.84/28,784.27
  6. Step 6: Final answer
    x = 29,302.04

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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.