Home / 28,734.90-39,679.08-21,194.30

Finding the Fourth Proportional to 28,734.90, 39,679.08 and 21,194.30

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Solution

The fourth proportional to 28,734.90, 39,679.08 and 21,194.30 is: 29,266.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,734.90 : 39,679.08 = 21,194.30 : x
  2. Step 2: Convert to fraction form
    28,734.90/39,679.08 = 21,194.30/x
  3. Step 3: Cross multiply
    28,734.90x = 39,679.08 × 21,194.30
  4. Step 4: Simplify right side
    28,734.90x = 840,970,325.24
  5. Step 5: Solve for x
    x = 840,970,325.24/28,734.90
  6. Step 6: Final answer
    x = 29,266.51

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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.