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Finding the Fourth Proportional to 30,919.68, 42,668.52 and 16,772.22

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Solution

The fourth proportional to 30,919.68, 42,668.52 and 16,772.22 is: 23,145.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.68 : 42,668.52 = 16,772.22 : x
  2. Step 2: Convert to fraction form
    30,919.68/42,668.52 = 16,772.22/x
  3. Step 3: Cross multiply
    30,919.68x = 42,668.52 × 16,772.22
  4. Step 4: Simplify right side
    30,919.68x = 715,645,804.51
  5. Step 5: Solve for x
    x = 715,645,804.51/30,919.68
  6. Step 6: Final answer
    x = 23,145.32

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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.