Home / 21,172.96-29,205.36-13,720.48

Finding the Fourth Proportional to 21,172.96, 29,205.36 and 13,720.48

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Solution

The fourth proportional to 21,172.96, 29,205.36 and 13,720.48 is: 18,925.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.96 : 29,205.36 = 13,720.48 : x
  2. Step 2: Convert to fraction form
    21,172.96/29,205.36 = 13,720.48/x
  3. Step 3: Cross multiply
    21,172.96x = 29,205.36 × 13,720.48
  4. Step 4: Simplify right side
    21,172.96x = 400,711,557.77
  5. Step 5: Solve for x
    x = 400,711,557.77/21,172.96
  6. Step 6: Final answer
    x = 18,925.63

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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.