Home / 30,643.47-42,292.11-17,215.49

Finding the Fourth Proportional to 30,643.47, 42,292.11 and 17,215.49

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Solution

The fourth proportional to 30,643.47, 42,292.11 and 17,215.49 is: 23,759.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,643.47 : 42,292.11 = 17,215.49 : x
  2. Step 2: Convert to fraction form
    30,643.47/42,292.11 = 17,215.49/x
  3. Step 3: Cross multiply
    30,643.47x = 42,292.11 × 17,215.49
  4. Step 4: Simplify right side
    30,643.47x = 728,079,185.32
  5. Step 5: Solve for x
    x = 728,079,185.32/30,643.47
  6. Step 6: Final answer
    x = 23,759.68

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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.