Home / 39,215.90-54,117.89-21,310.86

Finding the Fourth Proportional to 39,215.90, 54,117.89 and 21,310.86

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Solution

The fourth proportional to 39,215.90, 54,117.89 and 21,310.86 is: 29,408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,215.90 : 54,117.89 = 21,310.86 : x
  2. Step 2: Convert to fraction form
    39,215.90/54,117.89 = 21,310.86/x
  3. Step 3: Cross multiply
    39,215.90x = 54,117.89 × 21,310.86
  4. Step 4: Simplify right side
    39,215.90x = 1,153,298,953.59
  5. Step 5: Solve for x
    x = 1,153,298,953.59/39,215.90
  6. Step 6: Final answer
    x = 29,408.97

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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.