Home / 30,819.80-42,531.39-16,672.65

Finding the Fourth Proportional to 30,819.80, 42,531.39 and 16,672.65

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Solution

The fourth proportional to 30,819.80, 42,531.39 and 16,672.65 is: 23,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,819.80 : 42,531.39 = 16,672.65 : x
  2. Step 2: Convert to fraction form
    30,819.80/42,531.39 = 16,672.65/x
  3. Step 3: Cross multiply
    30,819.80x = 42,531.39 × 16,672.65
  4. Step 4: Simplify right side
    30,819.80x = 709,110,979.48
  5. Step 5: Solve for x
    x = 709,110,979.48/30,819.80
  6. Step 6: Final answer
    x = 23,008.30

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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.