Home / 21,356.40-29,481.76-12,402.12

Finding the Fourth Proportional to 21,356.40, 29,481.76 and 12,402.12

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Solution

The fourth proportional to 21,356.40, 29,481.76 and 12,402.12 is: 17,120.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.40 : 29,481.76 = 12,402.12 : x
  2. Step 2: Convert to fraction form
    21,356.40/29,481.76 = 12,402.12/x
  3. Step 3: Cross multiply
    21,356.40x = 29,481.76 × 12,402.12
  4. Step 4: Simplify right side
    21,356.40x = 365,636,325.33
  5. Step 5: Solve for x
    x = 365,636,325.33/21,356.40
  6. Step 6: Final answer
    x = 17,120.69

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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.