Home / 39,310.59-54,247.35-21,405.45

Finding the Fourth Proportional to 39,310.59, 54,247.35 and 21,405.45

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Solution

The fourth proportional to 39,310.59, 54,247.35 and 21,405.45 is: 29,538.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,310.59 : 54,247.35 = 21,405.45 : x
  2. Step 2: Convert to fraction form
    39,310.59/54,247.35 = 21,405.45/x
  3. Step 3: Cross multiply
    39,310.59x = 54,247.35 × 21,405.45
  4. Step 4: Simplify right side
    39,310.59x = 1,161,188,938.06
  5. Step 5: Solve for x
    x = 1,161,188,938.06/39,310.59
  6. Step 6: Final answer
    x = 29,538.83

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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.