Home / 39,312.13-54,249.10-21,407.09

Finding the Fourth Proportional to 39,312.13, 54,249.10 and 21,407.09

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Solution

The fourth proportional to 39,312.13, 54,249.10 and 21,407.09 is: 29,540.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,312.13 : 54,249.10 = 21,407.09 : x
  2. Step 2: Convert to fraction form
    39,312.13/54,249.10 = 21,407.09/x
  3. Step 3: Cross multiply
    39,312.13x = 54,249.10 × 21,407.09
  4. Step 4: Simplify right side
    39,312.13x = 1,161,315,366.12
  5. Step 5: Solve for x
    x = 1,161,315,366.12/39,312.13
  6. Step 6: Final answer
    x = 29,540.89

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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.