Home / 30,986.17-42,759.16-16,838.91

Finding the Fourth Proportional to 30,986.17, 42,759.16 and 16,838.91

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Solution

The fourth proportional to 30,986.17, 42,759.16 and 16,838.91 is: 23,236.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.17 : 42,759.16 = 16,838.91 : x
  2. Step 2: Convert to fraction form
    30,986.17/42,759.16 = 16,838.91/x
  3. Step 3: Cross multiply
    30,986.17x = 42,759.16 × 16,838.91
  4. Step 4: Simplify right side
    30,986.17x = 720,017,604.82
  5. Step 5: Solve for x
    x = 720,017,604.82/30,986.17
  6. Step 6: Final answer
    x = 23,236.74

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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.