Home / 30,660.83-42,344.07-21,125.51

Finding the Fourth Proportional to 30,660.83, 42,344.07 and 21,125.51

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Solution

The fourth proportional to 30,660.83, 42,344.07 and 21,125.51 is: 29,175.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660.83 : 42,344.07 = 21,125.51 : x
  2. Step 2: Convert to fraction form
    30,660.83/42,344.07 = 21,125.51/x
  3. Step 3: Cross multiply
    30,660.83x = 42,344.07 × 21,125.51
  4. Step 4: Simplify right side
    30,660.83x = 894,540,074.23
  5. Step 5: Solve for x
    x = 894,540,074.23/30,660.83
  6. Step 6: Final answer
    x = 29,175.34

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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.