Home / 21,708.48-29,961.60-13,329.60

Finding the Fourth Proportional to 21,708.48, 29,961.60 and 13,329.60

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Solution

The fourth proportional to 21,708.48, 29,961.60 and 13,329.60 is: 18,397.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708.48 : 29,961.60 = 13,329.60 : x
  2. Step 2: Convert to fraction form
    21,708.48/29,961.60 = 13,329.60/x
  3. Step 3: Cross multiply
    21,708.48x = 29,961.60 × 13,329.60
  4. Step 4: Simplify right side
    21,708.48x = 399,376,143.36
  5. Step 5: Solve for x
    x = 399,376,143.36/21,708.48
  6. Step 6: Final answer
    x = 18,397.24

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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.