Home / 30,912.08-42,646.59-20,169.59

Finding the Fourth Proportional to 30,912.08, 42,646.59 and 20,169.59

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Solution

The fourth proportional to 30,912.08, 42,646.59 and 20,169.59 is: 27,826.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,912.08 : 42,646.59 = 20,169.59 : x
  2. Step 2: Convert to fraction form
    30,912.08/42,646.59 = 20,169.59/x
  3. Step 3: Cross multiply
    30,912.08x = 42,646.59 × 20,169.59
  4. Step 4: Simplify right side
    30,912.08x = 860,164,235.20
  5. Step 5: Solve for x
    x = 860,164,235.20/30,912.08
  6. Step 6: Final answer
    x = 27,826.15

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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.