Home / 21,229.76-29,289.59-12,734.63

Finding the Fourth Proportional to 21,229.76, 29,289.59 and 12,734.63

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Solution

The fourth proportional to 21,229.76, 29,289.59 and 12,734.63 is: 17,569.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.76 : 29,289.59 = 12,734.63 : x
  2. Step 2: Convert to fraction form
    21,229.76/29,289.59 = 12,734.63/x
  3. Step 3: Cross multiply
    21,229.76x = 29,289.59 × 12,734.63
  4. Step 4: Simplify right side
    21,229.76x = 372,992,091.50
  5. Step 5: Solve for x
    x = 372,992,091.50/21,229.76
  6. Step 6: Final answer
    x = 17,569.30

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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.