Home / 39,827.90-54,961.44-21,679

Finding the Fourth Proportional to 39,827.90, 54,961.44 and 21,679

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Solution

The fourth proportional to 39,827.90, 54,961.44 and 21,679 is: 29,916.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,827.90 : 54,961.44 = 21,679 : x
  2. Step 2: Convert to fraction form
    39,827.90/54,961.44 = 21,679/x
  3. Step 3: Cross multiply
    39,827.90x = 54,961.44 × 21,679
  4. Step 4: Simplify right side
    39,827.90x = 1,191,509,057.76
  5. Step 5: Solve for x
    x = 1,191,509,057.76/39,827.90
  6. Step 6: Final answer
    x = 29,916.44

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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.