Home / 20,431.58-30,587.88-15,189.80

Finding the Fourth Proportional to 20,431.58, 30,587.88 and 15,189.80

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Solution

The fourth proportional to 20,431.58, 30,587.88 and 15,189.80 is: 22,740.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.58 : 30,587.88 = 15,189.80 : x
  2. Step 2: Convert to fraction form
    20,431.58/30,587.88 = 15,189.80/x
  3. Step 3: Cross multiply
    20,431.58x = 30,587.88 × 15,189.80
  4. Step 4: Simplify right side
    20,431.58x = 464,623,779.62
  5. Step 5: Solve for x
    x = 464,623,779.62/20,431.58
  6. Step 6: Final answer
    x = 22,740.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.