Home / 30,908.88-42,643.08-20,304.24

Finding the Fourth Proportional to 30,908.88, 42,643.08 and 20,304.24

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Solution

The fourth proportional to 30,908.88, 42,643.08 and 20,304.24 is: 28,012.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,908.88 : 42,643.08 = 20,304.24 : x
  2. Step 2: Convert to fraction form
    30,908.88/42,643.08 = 20,304.24/x
  3. Step 3: Cross multiply
    30,908.88x = 42,643.08 × 20,304.24
  4. Step 4: Simplify right side
    30,908.88x = 865,835,330.66
  5. Step 5: Solve for x
    x = 865,835,330.66/30,908.88
  6. Step 6: Final answer
    x = 28,012.51

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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.