Home / 21,388.50-29,515.59-11,957.13

Finding the Fourth Proportional to 21,388.50, 29,515.59 and 11,957.13

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Solution

The fourth proportional to 21,388.50, 29,515.59 and 11,957.13 is: 16,500.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.50 : 29,515.59 = 11,957.13 : x
  2. Step 2: Convert to fraction form
    21,388.50/29,515.59 = 11,957.13/x
  3. Step 3: Cross multiply
    21,388.50x = 29,515.59 × 11,957.13
  4. Step 4: Simplify right side
    21,388.50x = 352,921,746.66
  5. Step 5: Solve for x
    x = 352,921,746.66/21,388.50
  6. Step 6: Final answer
    x = 16,500.54

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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.