Home / 30,963.15-42,728.45-16,815.69

Finding the Fourth Proportional to 30,963.15, 42,728.45 and 16,815.69

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Solution

The fourth proportional to 30,963.15, 42,728.45 and 16,815.69 is: 23,205.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963.15 : 42,728.45 = 16,815.69 : x
  2. Step 2: Convert to fraction form
    30,963.15/42,728.45 = 16,815.69/x
  3. Step 3: Cross multiply
    30,963.15x = 42,728.45 × 16,815.69
  4. Step 4: Simplify right side
    30,963.15x = 718,508,285.30
  5. Step 5: Solve for x
    x = 718,508,285.30/30,963.15
  6. Step 6: Final answer
    x = 23,205.27

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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.