Home / 30,825.27-42,538.88-21,399.30

Finding the Fourth Proportional to 30,825.27, 42,538.88 and 21,399.30

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Solution

The fourth proportional to 30,825.27, 42,538.88 and 21,399.30 is: 29,531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,825.27 : 42,538.88 = 21,399.30 : x
  2. Step 2: Convert to fraction form
    30,825.27/42,538.88 = 21,399.30/x
  3. Step 3: Cross multiply
    30,825.27x = 42,538.88 × 21,399.30
  4. Step 4: Simplify right side
    30,825.27x = 910,302,095.59
  5. Step 5: Solve for x
    x = 910,302,095.59/30,825.27
  6. Step 6: Final answer
    x = 29,531.04

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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.