Home / 30,815.78-42,525.81-16,668.56

Finding the Fourth Proportional to 30,815.78, 42,525.81 and 16,668.56

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Solution

The fourth proportional to 30,815.78, 42,525.81 and 16,668.56 is: 23,002.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,815.78 : 42,525.81 = 16,668.56 : x
  2. Step 2: Convert to fraction form
    30,815.78/42,525.81 = 16,668.56/x
  3. Step 3: Cross multiply
    30,815.78x = 42,525.81 × 16,668.56
  4. Step 4: Simplify right side
    30,815.78x = 708,844,015.53
  5. Step 5: Solve for x
    x = 708,844,015.53/30,815.78
  6. Step 6: Final answer
    x = 23,002.63

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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.