Home / 30,963.24-42,728.13-16,815.78

Finding the Fourth Proportional to 30,963.24, 42,728.13 and 16,815.78

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Solution

The fourth proportional to 30,963.24, 42,728.13 and 16,815.78 is: 23,205.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963.24 : 42,728.13 = 16,815.78 : x
  2. Step 2: Convert to fraction form
    30,963.24/42,728.13 = 16,815.78/x
  3. Step 3: Cross multiply
    30,963.24x = 42,728.13 × 16,815.78
  4. Step 4: Simplify right side
    30,963.24x = 718,506,833.89
  5. Step 5: Solve for x
    x = 718,506,833.89/30,963.24
  6. Step 6: Final answer
    x = 23,205.16

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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.