Home / 39,418.60-54,397.86-21,513.99

Finding the Fourth Proportional to 39,418.60, 54,397.86 and 21,513.99

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Solution

The fourth proportional to 39,418.60, 54,397.86 and 21,513.99 is: 29,689.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,418.60 : 54,397.86 = 21,513.99 : x
  2. Step 2: Convert to fraction form
    39,418.60/54,397.86 = 21,513.99/x
  3. Step 3: Cross multiply
    39,418.60x = 54,397.86 × 21,513.99
  4. Step 4: Simplify right side
    39,418.60x = 1,170,315,016.06
  5. Step 5: Solve for x
    x = 1,170,315,016.06/39,418.60
  6. Step 6: Final answer
    x = 29,689.41

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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.