Home / 21,388.76-29,517.16-11,957.30

Finding the Fourth Proportional to 21,388.76, 29,517.16 and 11,957.30

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Solution

The fourth proportional to 21,388.76, 29,517.16 and 11,957.30 is: 16,501.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.76 : 29,517.16 = 11,957.30 : x
  2. Step 2: Convert to fraction form
    21,388.76/29,517.16 = 11,957.30/x
  3. Step 3: Cross multiply
    21,388.76x = 29,517.16 × 11,957.30
  4. Step 4: Simplify right side
    21,388.76x = 352,945,537.27
  5. Step 5: Solve for x
    x = 352,945,537.27/21,388.76
  6. Step 6: Final answer
    x = 16,501.45

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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.