Home / 39,387.21-54,353.13-21,482.57

Finding the Fourth Proportional to 39,387.21, 54,353.13 and 21,482.57

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Solution

The fourth proportional to 39,387.21, 54,353.13 and 21,482.57 is: 29,645.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,387.21 : 54,353.13 = 21,482.57 : x
  2. Step 2: Convert to fraction form
    39,387.21/54,353.13 = 21,482.57/x
  3. Step 3: Cross multiply
    39,387.21x = 54,353.13 × 21,482.57
  4. Step 4: Simplify right side
    39,387.21x = 1,167,644,648.18
  5. Step 5: Solve for x
    x = 1,167,644,648.18/39,387.21
  6. Step 6: Final answer
    x = 29,645.27

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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.