Home / 30,934.26-42,707.04-21,515.58

Finding the Fourth Proportional to 30,934.26, 42,707.04 and 21,515.58

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Solution

The fourth proportional to 30,934.26, 42,707.04 and 21,515.58 is: 29,703.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,934.26 : 42,707.04 = 21,515.58 : x
  2. Step 2: Convert to fraction form
    30,934.26/42,707.04 = 21,515.58/x
  3. Step 3: Cross multiply
    30,934.26x = 42,707.04 × 21,515.58
  4. Step 4: Simplify right side
    30,934.26x = 918,866,735.68
  5. Step 5: Solve for x
    x = 918,866,735.68/30,934.26
  6. Step 6: Final answer
    x = 29,703.85

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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.